Project 1

Introduction to the Data

My dataset is sourced from SlaveVoyages.org and comprises 3 quantitative variables, along with 5 categorical variables. The data details information about slave voyages from around the world over a 300-year time period, starting from the early 16th century. The quantitative data includes the year of departure, ship IDs, and captives on board. For categorical data, the data includes where the vessels began, where the slaves were captured, the captain’s name, etc. Among the categorical values, I believe it’s important to note that while the captain’s names were documented, the captor’s names were not. This signifies the capture’s transition into mere slaves, categorized into their physical value for purchase and labor.

Model of Slave Voyages from the Dataset Page

Loading the Data

library(tidyverse)

── Attaching core tidyverse packages ──────────────────────── tidyverse 2.0.0 ──
✔ dplyr     1.2.0     ✔ readr     2.1.6
✔ forcats   1.0.1     ✔ stringr   1.6.0
✔ ggplot2   4.0.2     ✔ tibble    3.3.1
✔ lubridate 1.9.5     ✔ tidyr     1.3.2
✔ purrr     1.2.1     
── Conflicts ────────────────────────────────────────── tidyverse_conflicts() ──
✖ dplyr::filter() masks stats::filter()
✖ dplyr::lag()    masks stats::lag()
ℹ Use the conflicted package (<http://conflicted.r-lib.org/>) to force all conflicts to become errors

setwd("C:/Users/Administrator/OneDrive - montgomerycollege.edu/DATA 110")
slavevoyage <- read_csv("transAtlanticSlaveTrade.csv")

Warning: One or more parsing issues, call `problems()` on your data frame for details,
e.g.:
  dat <- vroom(...)
  problems(dat)

Rows: 36069 Columns: 9
── Column specification ────────────────────────────────────────────────────────
Delimiter: ","
chr (5): Vessel name, Voyage itinerary imputed port where began (ptdepimp) p...
dbl (3): Year of arrival at port of disembarkation, Voyage ID, Captives arri...
lgl (1): VOYAGEID2

ℹ Use `spec()` to retrieve the full column specification for this data.
ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.

Cleaning Data Names

names(slavevoyage) <- tolower(names(slavevoyage))
names(slavevoyage) <- gsub(" ", "_",names(slavevoyage))

Shortening Long Names

slavevoyage1 <- slavevoyage |>
  rename(imputed_port_began = "voyage_itinerary_imputed_port_where_began_(ptdepimp)_place") |>
 rename(place_of_purchase = "voyage_itinerary_imputed_principal_place_of_slave_purchase_(mjbyptimp)") |>
    rename(disembark_point = "voyage_itinerary_imputed_principal_port_of_slave_disembarkation_(mjslptimp)_place")

Filtering Out N/A

voyage_nona <- slavevoyage1 |>
  filter(!is.na(imputed_port_began),
         !is.na(place_of_purchase),
         !is.na(disembark_point))
#remove nas from data

Linear Regression Model

fit1 <- lm(captives_arrived_at_1st_port ~ place_of_purchase + disembark_point + year_of_arrival_at_port_of_disembarkation, data = voyage_nona)
summary(fit1)

Call:
lm(formula = captives_arrived_at_1st_port ~ place_of_purchase + 
    disembark_point + year_of_arrival_at_port_of_disembarkation, 
    data = voyage_nona)

Residuals:
    Min      1Q  Median      3Q     Max 
-638.82  -80.13   -8.97   68.15 1047.41 

Coefficients:
                                                                                Estimate
(Intercept)                                                                   -141.41205
place_of_purchaseAfrica, port unspecified                                      -22.29293
place_of_purchaseAghway                                                        533.60780
place_of_purchaseAlampo                                                         20.24066
place_of_purchaseAlbreda                                                      -210.87460
place_of_purchaseAlecuba                                                       262.17729
place_of_purchaseAmbona                                                        153.04158
place_of_purchaseAmbriz                                                         60.28847
place_of_purchaseAndony                                                        -87.66776
place_of_purchaseAnomabu                                                        -8.69514
place_of_purchaseApammin                                                        98.53205
place_of_purchaseArdra                                                         108.48555
place_of_purchaseAxim                                                          -50.83728
place_of_purchaseBadagry/Apa                                                    54.26753
place_of_purchaseBanana Islands                                                -86.67913
place_of_purchaseBance/Bunce Island                                            -32.85695
place_of_purchaseBassa                                                         -22.32693
place_of_purchaseBenguela                                                       75.64604
place_of_purchaseBenin                                                         -36.93756
place_of_purchaseBight of Benin, place unspecified                              45.88846
place_of_purchaseBight of Biafra and Gulf of Guinea Islands, port unspecified    0.44859
place_of_purchaseBights                                                        -71.63503
place_of_purchaseBilbay                                                       -200.79645
place_of_purchaseBimbia                                                        -82.13134
place_of_purchaseBissagos                                                       -4.79951
place_of_purchaseBissau                                                        -83.85587
place_of_purchaseBoary                                                          44.99993
place_of_purchaseBonny                                                          74.74307
place_of_purchaseBundy                                                        -175.60679
place_of_purchaseCabinda                                                        66.86190
place_of_purchaseCacheu                                                        -83.23240
place_of_purchaseCalabar                                                        -1.27036
place_of_purchaseCameroons                                                     -26.40370
place_of_purchaseCameroons River                                                 8.81785
place_of_purchaseCap Lopez                                                     -74.05954
place_of_purchaseCape Coast Castle                                              -2.51793
place_of_purchaseCape Lahou                                                    -52.29525
place_of_purchaseCape Mole                                                    -162.92519
place_of_purchaseCape Mount (Cape Grand Mount)                                 -40.06407
place_of_purchaseCape Verde Islands                                            -28.39246
place_of_purchaseCasamance                                                     -99.63348
place_of_purchaseCess                                                          -66.97035
place_of_purchaseChristiansborg                                                -65.30048
place_of_purchaseCoanza River                                                   59.44592
place_of_purchaseCongo North                                                    55.61558
place_of_purchaseCongo River                                                    40.95657
place_of_purchaseCorisco                                                      -195.95570
place_of_purchaseCosta da Mina, place unspecified                               56.63700
place_of_purchaseCosta de Africa (mainland coast around S Tome/Principe)      -110.38515
place_of_purchaseCosta Leste Occidental                                       -262.68843
place_of_purchaseDanish Gold Coast                                             -99.67007
place_of_purchaseDelagoa                                                       -66.34275
place_of_purchaseDembia                                                        -91.94599
place_of_purchaseDrouin                                                         -5.49524
place_of_purchaseElmina                                                         14.28129
place_of_purchaseEpe                                                            42.34439
place_of_purchaseEva                                                          -138.95241
place_of_purchaseFormosa                                                      -105.65716
place_of_purchaseGabon                                                        -115.04219
place_of_purchaseGalam                                                        -126.04473
place_of_purchaseGallinhas                                                     -11.69118
place_of_purchaseGambia                                                        -77.02121
place_of_purchaseGold Coast + Bight of Benin + Bight of Biafra                  14.11768
place_of_purchaseGold Coast, Fr. definition                                     -1.38148
place_of_purchaseGold Coast, port unspecified                                   -2.67229
place_of_purchaseGorée                                                         -50.38357
place_of_purchaseGrand Bassa                                                  -112.29005
place_of_purchaseGrand Bassam                                                   -7.50372
place_of_purchaseGrand Mesurado                                                -83.46141
place_of_purchaseGrand Popo                                                     22.57227
place_of_purchaseGrand Sestos                                                  -89.47783
place_of_purchaseGrenada Point                                                  77.20355
place_of_purchaseGulf of Guinea islands                                         57.57207
place_of_purchaseIbo                                                           191.76631
place_of_purchaseIfe                                                           -42.18254
place_of_purchaseIles de Los                                                   -11.10868
place_of_purchaseIles Plantain                                                 -45.30406
place_of_purchaseInhambane                                                     115.73695
place_of_purchaseIvory Coast                                                   -22.76170
place_of_purchaseJacquin                                                       113.04580
place_of_purchaseJoal, or Saloum River                                         -66.62280
place_of_purchaseKeta                                                          -46.91686
place_of_purchaseKilongo                                                       288.29236
place_of_purchaseKilwa                                                         -47.82476
place_of_purchaseKormantine                                                     16.93078
place_of_purchaseLagos, Onim                                                    71.84413
place_of_purchaseLay                                                           192.80093
place_of_purchaseLegas                                                          17.01389
place_of_purchaseLittle Bassa                                                 -104.79189
place_of_purchaseLittle Junk                                                  -134.97770
place_of_purchaseLittle Popo                                                    -7.07907
place_of_purchaseLoango                                                         60.84019
place_of_purchaseLourenço Marques                                              127.42922
place_of_purchaseLuanda                                                         87.84487
place_of_purchaseMadagascar                                                     17.95635
place_of_purchaseMadeira                                                        29.22884
place_of_purchaseMalembo                                                        47.28718
place_of_purchaseMano                                                         -142.52680
place_of_purchaseMascarene Islands                                             -61.41718
place_of_purchaseMayumba                                                       -67.10813
place_of_purchaseMomboza or Zanzibar                                            46.23697
place_of_purchaseMozambique                                                     93.92256
place_of_purchaseMpinda                                                         -5.02237
place_of_purchaseNew Calabar                                                     8.38084
place_of_purchaseNovo Redondo                                                    4.04308
place_of_purchaseOerê                                                          -42.89667
place_of_purchasePenido                                                       -260.28608
place_of_purchasePetit Mesurado                                               -130.60665
place_of_purchasePokesoe (Princes Town)                                       -123.51902
place_of_purchasePopo                                                           -1.09440
place_of_purchasePorto Novo                                                     66.44503
place_of_purchasePortudal                                                      -48.06616
place_of_purchasePortuguese Guinea                                              28.89267
place_of_purchasePrinces Island                                                -75.13059
place_of_purchaseQuaqua                                                       -171.76189
place_of_purchaseQuicombo                                                     -107.92823
place_of_purchaseQuilimane                                                     115.39644
place_of_purchaseQuirimba                                                     -109.33201
place_of_purchaseRio Nun                                                        22.87946
place_of_purchaseRio Nunez                                                       6.12029
place_of_purchaseRio Pongo                                                     -90.03686
place_of_purchaseRio Zaire                                                     -35.97817
place_of_purchaseRiver Brass                                                    12.10317
place_of_purchaseRiver del Rey                                                 -88.35245
place_of_purchaseRiver Kissey                                                 -119.69873
place_of_purchaseSaint-Louis                                                   -66.64022
place_of_purchaseSão Tomé                                                      -99.95837
place_of_purchaseSão Tomé or Princes Island                                   -215.96689
place_of_purchaseSassandra                                                     101.06582
place_of_purchaseScarcies                                                     -188.67568
place_of_purchaseSenegambia and offshore Atlantic, port unspecified            -71.09238
place_of_purchaseSenegambia or Sierra Leone                                     28.48480
place_of_purchaseSettra Kru                                                   -140.58178
place_of_purchaseSherbro                                                       -51.04186
place_of_purchaseSierra Leone estuary                                          -56.63539
place_of_purchaseSierra Leone, port unspecified                               -109.66570
place_of_purchaseSofala                                                        -62.82475
place_of_purchaseSoutheast Africa and Indian Ocean islands, port unspecified    17.41129
place_of_purchaseSoyo                                                          -68.27102
place_of_purchaseSt. Paul                                                       50.83210
place_of_purchaseSugary (Siekere)                                                8.05401
place_of_purchaseTabou                                                          98.58287
place_of_purchaseTrade Town                                                   -183.24876
place_of_purchaseWest Central Africa and St. Helena, port unspecified           68.86052
place_of_purchaseWhydah, Ouidah                                                 79.84932
place_of_purchaseWiamba                                                        -30.37442
place_of_purchaseWindward + Ivory + Gold + Benin                               -32.53853
place_of_purchaseWindward Coast (Nunez - Assini)                               -33.28853
place_of_purchaseWindward Coast, place unspecified                             -55.20475
place_of_purchaseZanzibar                                                      -91.10326
disembark_pointAccra                                                            16.20425
disembark_pointAfrica, port unspecified                                       -122.63642
disembark_pointAlagoas, place unspecified                                      210.42111
disembark_pointAmelia Island                                                    21.95694
disembark_pointAmericas, port unspecified                                       23.94784
disembark_pointAnnapolis                                                       -38.28871
disembark_pointAnnotto Bay                                                      39.96362
disembark_pointAntigua, place unspecified                                       63.39213
disembark_pointAntonia                                                          47.10772
disembark_pointBahamas, port unspecified                                        35.59413
disembark_pointBahia Honda                                                     285.08973
disembark_pointBahia, place unspecified                                         67.75834
disembark_pointBaía de Botafogo                                                 48.01572
disembark_pointBaía de Sepetiba                                                278.19636
disembark_pointBanes                                                           204.65738
disembark_pointBarbados, place unspecified                                       4.10601
disembark_pointBasse-Terre                                                      42.18631
disembark_pointBatabanó                                                       -176.14856
disembark_pointBeaufort                                                          8.59601
disembark_pointBenin                                                            87.49636
disembark_pointBerbice                                                          82.55102
disembark_pointBight of Biafra and Gulf of Guinea Islands, port unspecified    -58.49443
disembark_pointBiloxi                                                           38.75408
disembark_pointBlack River                                                      76.57466
disembark_pointBonny                                                            87.35015
disembark_pointBorburata                                                       -40.11288
disembark_pointBoston                                                          -85.65125
disembark_pointBristol                                                        -159.83808
disembark_pointBritish Caribbean, colony unspecified                            49.54284
disembark_pointBritish Honduras, port unspecified                               44.79011
disembark_pointBritish Leewards                                                 91.09336
disembark_pointBuenos Aires                                                     82.46724
disembark_pointCabanas                                                         171.12939
disembark_pointCabinda                                                          11.73118
disembark_pointCabo de Búzios                                                  221.66477
disembark_pointCabo Frio                                                       213.64013
disembark_pointCadiz                                                           -43.32019
disembark_pointCampos                                                          171.32282
disembark_pointCananéia                                                        298.70480
disembark_pointCanasí                                                          518.93578
disembark_pointCap Français                                                     87.14931
disembark_pointCape of Good Hope                                               -10.68380
disembark_pointCaracas                                                         220.86857
disembark_pointCardenas                                                        403.73146
disembark_pointCaribbean (colony unspecified)                                   14.98586
disembark_pointCartagena                                                       -18.59884
disembark_pointCatuamo and Maria Farinha                                       191.74918
disembark_pointCayenne                                                         -21.00460
disembark_pointCayes (Les)                                                      50.45851
disembark_pointCharleston                                                       11.40134
disembark_pointCienfuegos                                                       46.01554
disembark_pointCopacabana                                                       -7.78992
disembark_pointCuba, port unspecified                                          134.34522
disembark_pointCuba, south coast                                               154.42931
disembark_pointCuba, west coast                                                154.87087
disembark_pointCul-de-Sac                                                       89.42502
disembark_pointCumana                                                          -29.48517
disembark_pointCumingsberg                                                       1.78897
disembark_pointCuraçao                                                         170.23312
disembark_pointDanish West Indies, colony unspecified                           59.66421
disembark_pointDemerara                                                         59.32861
disembark_pointDois Rios                                                       299.58452
disembark_pointDominica, place unspecified                                      49.60128
disembark_pointDutch Caribbean, colony unspecified                              28.04740
disembark_pointDutch Guianas, colony unspecified                                47.83093
disembark_pointEastern New Jersey                                              -64.79932
disembark_pointEssequibo                                                        64.65041
disembark_pointFalmouth (Jam.)                                                  72.56430
disembark_pointFernando Po                                                      17.89577
disembark_pointFlorida, port unspecified                                       -27.87264
disembark_pointFort Dauphin                                                    188.90944
disembark_pointFrance, place unspecified                                      -255.26716
disembark_pointFreetown                                                         -7.33068
disembark_pointFrench Africa (Goree or Senegal)                                -79.15489
disembark_pointFrench Caribbean, colony unspecified                             48.30487
disembark_pointGeorgia, port unspecified                                        34.48519
disembark_pointGrenada, place unspecified                                       42.52749
disembark_pointGuadeloupe, place unspecified                                    17.70741
disembark_pointGuanimar                                                        180.46992
disembark_pointGuayama                                                         -44.54777
disembark_pointGuiana                                                           77.60288
disembark_pointGustavia, St. Barthélemy                                       -142.68298
disembark_pointHampton                                                         -53.35162
disembark_pointHavana                                                           37.37469
disembark_pointHispaniola, unspecified                                          26.47947
disembark_pointIlha das Palmas                                                 217.16181
disembark_pointIlha de Itamaric                                                  8.48642
disembark_pointIlha de Lobes                                                    30.35147
disembark_pointIlha de Marambaia                                               163.58019
disembark_pointIlha de Paquetá                                                -198.02785
disembark_pointIlha Grande                                                     192.05176
disembark_pointIsla de Pinas                                                   364.87277
disembark_pointJacmel                                                           16.97369
disembark_pointJamaica, place unspecified                                       62.34862
disembark_pointJérémie                                                           2.95733
disembark_pointKey West                                                        257.68792
disembark_pointKingston                                                         73.22612
disembark_pointKingston (Demerera)                                              85.74809
disembark_pointLa Balise                                                       146.43191
disembark_pointLa Guaira                                                       191.09053
disembark_pointLe Havre                                                        -73.12433
disembark_pointLéogane                                                          82.86627
disembark_pointLiberia                                                         371.30049
disembark_pointLisbon                                                          -43.17729
disembark_pointLondontowne                                                      13.00986
disembark_pointLouisiana                                                         5.06503
disembark_pointLower James River                                               -41.55290
disembark_pointLuanda                                                         -284.76018
disembark_pointLucea (a) St. Lucea                                              14.89033
disembark_pointMacaé                                                           165.99299
disembark_pointMaceió                                                          218.50730
disembark_pointMagari, Manzanillo                                              503.14672
disembark_pointMangaratiba                                                     110.01212
disembark_pointMaranhão                                                         43.50749
disembark_pointMargarita                                                       -89.25084
disembark_pointMaricá                                                           91.96940
disembark_pointMariel                                                          225.96605
disembark_pointMartha Brae                                                      31.23638
disembark_pointMartinique, place unspecified                                    36.93482
disembark_pointMaryland, port unspecified                                       13.39965
disembark_pointMatanzas                                                        207.30206
disembark_pointMatanzas province, south                                        399.70540
disembark_pointMobile                                                         -181.20482
disembark_pointMontego Bay                                                      81.84589
disembark_pointMontevideo                                                      -27.01060
disembark_pointMontserrat, port unspecified                                      9.23724
disembark_pointMorant Bay                                                      -82.56137
disembark_pointNassau                                                           58.23414
disembark_pointNevis, port unspecified                                         -80.80319
disembark_pointNew Orleans                                                       8.15132
disembark_pointNew York                                                        -62.45967
disembark_pointNewcastle (Nevis)                                                -0.04690
disembark_pointNewport                                                         -59.49959
disembark_pointNorth Carolina, port unspecified                                121.00491
disembark_pointNorth Potomac                                                    31.17522
disembark_pointOxford                                                          -47.70623
disembark_pointPará                                                             73.49733
disembark_pointParaíba                                                         -96.68616
disembark_pointParamaribo                                                      144.54327
disembark_pointParanaguá                                                       249.16301
disembark_pointParati                                                          126.02120
disembark_pointPatuxent                                                         26.32817
disembark_pointPernambuco, place unspecified                                    23.63134
disembark_pointPetit-Goâve                                                      72.06638
disembark_pointPhiladelphia                                                   -116.07944
disembark_pointPonta Negro                                                     138.96385
disembark_pointPort-au-Prince                                                   92.54685
disembark_pointPort-de-Paix                                                    -38.12210
disembark_pointPort Maria                                                      101.77649
disembark_pointPort Royal                                                       73.84128
disembark_pointPorto de Galinhas                                               -56.02802
disembark_pointPortobelo                                                        87.00052
disembark_pointPuerto Padre                                                    413.62016
disembark_pointPuerto Rico, port unspecified                                    69.08680
disembark_pointRappahannock                                                      1.30607
disembark_pointRhode Island, port unspecified                                  -52.28700
disembark_pointRio de Janeiro                                                  136.02273
disembark_pointRio de Janeiro province                                         151.20394
disembark_pointRio de Janeiro, Sao Paulo, Santa Catarina                       373.28075
disembark_pointRio de la Hacha                                                  36.28061
disembark_pointRio Grande do Norte                                              91.20759
disembark_pointRio Grande do Sul, place unspecified                             47.64436
disembark_pointRio Pongo                                                       -48.59428
disembark_pointRio São Jeso                                                    101.24845
disembark_pointRoanoke                                                         -76.44625
disembark_pointSagua                                                           257.41285
disembark_pointSaint-Domingue, then Haiti, port unspecified                     51.05926
disembark_pointSaint-Marc                                                       76.95856
disembark_pointSaint Ann's Bay                                                 -50.99061
disembark_pointSaint John (Antigua)                                             27.84954
disembark_pointSamana                                                         -186.37084
disembark_pointSanta Marta                                                    -146.64593
disembark_pointSantiago de Cuba                                                103.88741
disembark_pointSantos                                                          251.85726
disembark_pointSão Sebastião                                                   188.73293
disembark_pointSão Tomé                                                        -34.15540
disembark_pointSavanna la Mar                                                   41.94779
disembark_pointSavannah                                                        -32.37361
disembark_pointSenegambia and offshore Atlantic, port unspecified             -110.28399
disembark_pointSouth Carolina, place unspecified                                42.52895
disembark_pointSouth Potomac                                                   -42.10761
disembark_pointSpanish Americas, port unspecified                              -32.52687
disembark_pointSpanish Caribbean, unspecified                                   82.03039
disembark_pointSpanish Circum-Caribbean,unspecified                             32.74271
disembark_pointSpanish Town                                                     46.69883
disembark_pointSt. Augustine                                                   -25.64452
disembark_pointSt. Barthélemy, port unspecified                                -50.57455
disembark_pointSt. Croix                                                        37.23000
disembark_pointSt. Eustatius                                                   158.41585
disembark_pointSt. Helena                                                      175.98661
disembark_pointSt. Kitts, port unspecified                                      29.93295
disembark_pointSt. Lucia, port unspecified                                      56.28151
disembark_pointSt. Maarten                                                     -93.75016
disembark_pointSt. Thomas                                                      -14.60494
disembark_pointSt. Vincent, port unspecified                                    40.05051
disembark_pointStabroek                                                         16.07571
disembark_pointSuriname, place unspecified                                      93.84441
disembark_pointTaipu                                                           194.80641
disembark_pointTenerife                                                        -20.89061
disembark_pointTobago, port unspecified                                        -23.70012
disembark_pointTortola, port unspecified                                        54.10389
disembark_pointTortuga                                                         186.55866
disembark_pointTrinidad and Tobago, place unspecified                           50.18858
disembark_pointTrinidad de Cuba                                                129.67587
disembark_pointTybee Island                                                    -88.02695
disembark_pointUbatuba                                                         255.77106
disembark_pointUpper James River                                                40.62510
disembark_pointUSA, location unspecified                                        -7.22926
disembark_pointVeracruz                                                        -38.60953
disembark_pointVirginia, port unspecified                                       19.56818
disembark_pointYork River                                                        1.87817
disembark_pointZion Hill                                                        81.19998
year_of_arrival_at_port_of_disembarkation                                        0.18966
                                                                              Std. Error
(Intercept)                                                                     93.10096
place_of_purchaseAfrica, port unspecified                                       20.78646
place_of_purchaseAghway                                                        142.55115
place_of_purchaseAlampo                                                         66.50258
place_of_purchaseAlbreda                                                        91.69913
place_of_purchaseAlecuba                                                       127.81341
place_of_purchaseAmbona                                                         91.90689
place_of_purchaseAmbriz                                                         22.58653
place_of_purchaseAndony                                                        127.82887
place_of_purchaseAnomabu                                                        21.55799
place_of_purchaseApammin                                                        66.42424
place_of_purchaseArdra                                                          25.20085
place_of_purchaseAxim                                                           60.32702
place_of_purchaseBadagry/Apa                                                    25.03103
place_of_purchaseBanana Islands                                                 34.26214
place_of_purchaseBance/Bunce Island                                             27.38953
place_of_purchaseBassa                                                          25.66265
place_of_purchaseBenguela                                                       21.68482
place_of_purchaseBenin                                                          25.09944
place_of_purchaseBight of Benin, place unspecified                              24.01722
place_of_purchaseBight of Biafra and Gulf of Guinea Islands, port unspecified   22.46658
place_of_purchaseBights                                                         66.70415
place_of_purchaseBilbay                                                        127.97372
place_of_purchaseBimbia                                                         55.59599
place_of_purchaseBissagos                                                       94.60341
place_of_purchaseBissau                                                         27.36866
place_of_purchaseBoary                                                          42.18699
place_of_purchaseBonny                                                          21.09320
place_of_purchaseBundy                                                         127.97365
place_of_purchaseCabinda                                                        21.31473
place_of_purchaseCacheu                                                         27.18481
place_of_purchaseCalabar                                                        21.27825
place_of_purchaseCameroons                                                      25.28342
place_of_purchaseCameroons River                                                34.58131
place_of_purchaseCap Lopez                                                      33.06535
place_of_purchaseCape Coast Castle                                              21.98438
place_of_purchaseCape Lahou                                                     25.69606
place_of_purchaseCape Mole                                                     128.00765
place_of_purchaseCape Mount (Cape Grand Mount)                                  23.36687
place_of_purchaseCape Verde Islands                                             27.64097
place_of_purchaseCasamance                                                     127.82956
place_of_purchaseCess                                                           66.42499
place_of_purchaseChristiansborg                                                 41.57554
place_of_purchaseCoanza River                                                   92.20119
place_of_purchaseCongo North                                                    23.29852
place_of_purchaseCongo River                                                    22.13049
place_of_purchaseCorisco                                                       127.96648
place_of_purchaseCosta da Mina, place unspecified                               21.64562
place_of_purchaseCosta de Africa (mainland coast around S Tome/Principe)       127.87972
place_of_purchaseCosta Leste Occidental                                        127.86095
place_of_purchaseDanish Gold Coast                                             128.02108
place_of_purchaseDelagoa                                                        76.08536
place_of_purchaseDembia                                                        128.02282
place_of_purchaseDrouin                                                        127.83722
place_of_purchaseElmina                                                         23.88864
place_of_purchaseEpe                                                            29.50787
place_of_purchaseEva                                                           127.84296
place_of_purchaseFormosa                                                        91.64042
place_of_purchaseGabon                                                          24.93279
place_of_purchaseGalam                                                          66.39539
place_of_purchaseGallinhas                                                      25.73980
place_of_purchaseGambia                                                         21.65906
place_of_purchaseGold Coast + Bight of Benin + Bight of Biafra                  92.22133
place_of_purchaseGold Coast, Fr. definition                                     23.59352
place_of_purchaseGold Coast, port unspecified                                   21.17110
place_of_purchaseGorée                                                          24.86816
place_of_purchaseGrand Bassa                                                    60.94930
place_of_purchaseGrand Bassam                                                   95.50875
place_of_purchaseGrand Mesurado                                                 40.60761
place_of_purchaseGrand Popo                                                    127.93759
place_of_purchaseGrand Sestos                                                   55.58244
place_of_purchaseGrenada Point                                                 127.97372
place_of_purchaseGulf of Guinea islands                                        128.12410
place_of_purchaseIbo                                                           100.72661
place_of_purchaseIfe                                                            91.61866
place_of_purchaseIles de Los                                                    23.60424
place_of_purchaseIles Plantain                                                  75.73702
place_of_purchaseInhambane                                                      37.21059
place_of_purchaseIvory Coast                                                    91.62120
place_of_purchaseJacquin                                                        30.02599
place_of_purchaseJoal, or Saloum River                                         179.83769
place_of_purchaseKeta                                                           41.18639
place_of_purchaseKilongo                                                       131.92910
place_of_purchaseKilwa                                                          44.94494
place_of_purchaseKormantine                                                     37.13944
place_of_purchaseLagos, Onim                                                    22.65348
place_of_purchaseLay                                                           127.94739
place_of_purchaseLegas                                                         127.97381
place_of_purchaseLittle Bassa                                                   91.78355
place_of_purchaseLittle Junk                                                   128.09173
place_of_purchaseLittle Popo                                                    37.76008
place_of_purchaseLoango                                                         22.51208
place_of_purchaseLourenço Marques                                               39.85514
place_of_purchaseLuanda                                                         21.19818
place_of_purchaseMadagascar                                                     29.15413
place_of_purchaseMadeira                                                       127.83192
place_of_purchaseMalembo                                                        21.52946
place_of_purchaseMano                                                           75.74105
place_of_purchaseMascarene Islands                                             128.29606
place_of_purchaseMayumba                                                        52.57783
place_of_purchaseMomboza or Zanzibar                                           127.82515
place_of_purchaseMozambique                                                     22.14788
place_of_purchaseMpinda                                                         76.13919
place_of_purchaseNew Calabar                                                    22.48610
place_of_purchaseNovo Redondo                                                   76.09687
place_of_purchaseOerê                                                           91.60797
place_of_purchasePenido                                                        127.84954
place_of_purchasePetit Mesurado                                                128.14323
place_of_purchasePokesoe (Princes Town)                                        137.94193
place_of_purchasePopo                                                           27.33717
place_of_purchasePorto Novo                                                     24.18640
place_of_purchasePortudal                                                       97.87891
place_of_purchasePortuguese Guinea                                              27.61643
place_of_purchasePrinces Island                                                 31.84427
place_of_purchaseQuaqua                                                        127.97404
place_of_purchaseQuicombo                                                      129.53674
place_of_purchaseQuilimane                                                      23.09343
place_of_purchaseQuirimba                                                       91.58652
place_of_purchaseRio Nun                                                        52.33711
place_of_purchaseRio Nunez                                                      47.16252
place_of_purchaseRio Pongo                                                      26.22163
place_of_purchaseRio Zaire                                                      52.10195
place_of_purchaseRiver Brass                                                    43.49812
place_of_purchaseRiver del Rey                                                  91.79666
place_of_purchaseRiver Kissey                                                   75.82711
place_of_purchaseSaint-Louis                                                    23.11483
place_of_purchaseSão Tomé                                                       25.32174
place_of_purchaseSão Tomé or Princes Island                                     91.62733
place_of_purchaseSassandra                                                     128.30342
place_of_purchaseScarcies                                                      128.29588
place_of_purchaseSenegambia and offshore Atlantic, port unspecified             25.17719
place_of_purchaseSenegambia or Sierra Leone                                    127.90508
place_of_purchaseSettra Kru                                                    127.83109
place_of_purchaseSherbro                                                        30.29226
place_of_purchaseSierra Leone estuary                                           22.10221
place_of_purchaseSierra Leone, port unspecified                                 39.00860
place_of_purchaseSofala                                                         92.52273
place_of_purchaseSoutheast Africa and Indian Ocean islands, port unspecified    39.63183
place_of_purchaseSoyo                                                          127.84779
place_of_purchaseSt. Paul                                                      127.82701
place_of_purchaseSugary (Siekere)                                              128.02282
place_of_purchaseTabou                                                         127.97359
place_of_purchaseTrade Town                                                    127.96701
place_of_purchaseWest Central Africa and St. Helena, port unspecified           20.92389
place_of_purchaseWhydah, Ouidah                                                 21.11354
place_of_purchaseWiamba                                                        127.85568
place_of_purchaseWindward + Ivory + Gold + Benin                                23.18482
place_of_purchaseWindward Coast (Nunez - Assini)                                25.22677
place_of_purchaseWindward Coast, place unspecified                              22.17640
place_of_purchaseZanzibar                                                      128.66682
disembark_pointAccra                                                           138.91702
disembark_pointAfrica, port unspecified                                        138.29699
disembark_pointAlagoas, place unspecified                                      105.63561
disembark_pointAmelia Island                                                   105.60356
disembark_pointAmericas, port unspecified                                       60.68885
disembark_pointAnnapolis                                                        65.26089
disembark_pointAnnotto Bay                                                     105.96581
disembark_pointAntigua, place unspecified                                       64.79133
disembark_pointAntonia                                                          80.07401
disembark_pointBahamas, port unspecified                                        60.35512
disembark_pointBahia Honda                                                      72.13468
disembark_pointBahia, place unspecified                                         56.74840
disembark_pointBaía de Botafogo                                                 85.05312
disembark_pointBaía de Sepetiba                                                 76.78079
disembark_pointBanes                                                            84.81437
disembark_pointBarbados, place unspecified                                      56.63430
disembark_pointBasse-Terre                                                      57.84265
disembark_pointBatabanó                                                        138.22116
disembark_pointBeaufort                                                        105.60943
disembark_pointBenin                                                           138.94477
disembark_pointBerbice                                                          60.84270
disembark_pointBight of Biafra and Gulf of Guinea Islands, port unspecified    138.37598
disembark_pointBiloxi                                                           79.99165
disembark_pointBlack River                                                      70.50527
disembark_pointBonny                                                           138.27135
disembark_pointBorburata                                                       138.45730
disembark_pointBoston                                                           76.58611
disembark_pointBristol                                                         138.21256
disembark_pointBritish Caribbean, colony unspecified                            60.34689
disembark_pointBritish Honduras, port unspecified                              105.94183
disembark_pointBritish Leewards                                                138.24064
disembark_pointBuenos Aires                                                     58.53656
disembark_pointCabanas                                                          68.22844
disembark_pointCabinda                                                         138.31915
disembark_pointCabo de Búzios                                                   74.26881
disembark_pointCabo Frio                                                        62.46348
disembark_pointCadiz                                                           138.32044
disembark_pointCampos                                                           58.04157
disembark_pointCananéia                                                        138.46969
disembark_pointCanasí                                                          105.80199
disembark_pointCap Français                                                     56.73069
disembark_pointCape of Good Hope                                                67.54457
disembark_pointCaracas                                                          92.21271
disembark_pointCardenas                                                         65.46217
disembark_pointCaribbean (colony unspecified)                                   67.26371
disembark_pointCartagena                                                        57.53701
disembark_pointCatuamo and Maria Farinha                                        70.67562
disembark_pointCayenne                                                          59.49317
disembark_pointCayes (Les)                                                      57.37606
disembark_pointCharleston                                                       56.78036
disembark_pointCienfuegos                                                      138.45637
disembark_pointCopacabana                                                       80.08004
disembark_pointCuba, port unspecified                                           57.85533
disembark_pointCuba, south coast                                                63.94711
disembark_pointCuba, west coast                                                 84.87571
disembark_pointCul-de-Sac                                                       78.27371
disembark_pointCumana                                                          105.74172
disembark_pointCumingsberg                                                      92.20839
disembark_pointCuraçao                                                          58.13667
disembark_pointDanish West Indies, colony unspecified                           76.77362
disembark_pointDemerara                                                         57.22262
disembark_pointDois Rios                                                       138.45448
disembark_pointDominica, place unspecified                                      57.05480
disembark_pointDutch Caribbean, colony unspecified                             138.36096
disembark_pointDutch Guianas, colony unspecified                                73.97411
disembark_pointEastern New Jersey                                              138.29080
disembark_pointEssequibo                                                        59.42066
disembark_pointFalmouth (Jam.)                                                  72.93571
disembark_pointFernando Po                                                     140.97417
disembark_pointFlorida, port unspecified                                       105.60560
disembark_pointFort Dauphin                                                    138.35982
disembark_pointFrance, place unspecified                                       138.26703
disembark_pointFreetown                                                         56.98876
disembark_pointFrench Africa (Goree or Senegal)                                 88.27482
disembark_pointFrench Caribbean, colony unspecified                             61.75460
disembark_pointGeorgia, port unspecified                                       105.68093
disembark_pointGrenada, place unspecified                                       56.94968
disembark_pointGuadeloupe, place unspecified                                    84.73676
disembark_pointGuanimar                                                         74.07886
disembark_pointGuayama                                                         139.59508
disembark_pointGuiana                                                          149.38436
disembark_pointGustavia, St. Barthélemy                                        138.21605
disembark_pointHampton                                                          92.28907
disembark_pointHavana                                                           56.78486
disembark_pointHispaniola, unspecified                                          76.75126
disembark_pointIlha das Palmas                                                 138.32779
disembark_pointIlha de Itamaric                                                 92.28812
disembark_pointIlha de Lobes                                                   138.32692
disembark_pointIlha de Marambaia                                                88.50564
disembark_pointIlha de Paquetá                                                 138.32866
disembark_pointIlha Grande                                                      59.54672
disembark_pointIsla de Pinas                                                    85.25213
disembark_pointJacmel                                                           69.29797
disembark_pointJamaica, place unspecified                                       56.74141
disembark_pointJérémie                                                          80.17932
disembark_pointKey West                                                        105.92579
disembark_pointKingston                                                         56.61501
disembark_pointKingston (Demerera)                                             138.25271
disembark_pointLa Balise                                                        72.36209
disembark_pointLa Guaira                                                        79.95273
disembark_pointLe Havre                                                        139.01390
disembark_pointLéogane                                                          57.36684
disembark_pointLiberia                                                          72.21895
disembark_pointLisbon                                                           85.17670
disembark_pointLondontowne                                                      92.30482
disembark_pointLouisiana                                                        70.64374
disembark_pointLower James River                                                79.90052
disembark_pointLuanda                                                          138.42840
disembark_pointLucea (a) St. Lucea                                              70.55101
disembark_pointMacaé                                                            59.08733
disembark_pointMaceió                                                          138.54387
disembark_pointMagari, Manzanillo                                              105.73616
disembark_pointMangaratiba                                                      69.43473
disembark_pointMaranhão                                                         58.82746
disembark_pointMargarita                                                       138.44329
disembark_pointMaricá                                                           71.42092
disembark_pointMariel                                                           79.99329
disembark_pointMartha Brae                                                      73.94581
disembark_pointMartinique, place unspecified                                    56.92870
disembark_pointMaryland, port unspecified                                       63.54851
disembark_pointMatanzas                                                         65.91919
disembark_pointMatanzas province, south                                        105.86489
disembark_pointMobile                                                          138.33846
disembark_pointMontego Bay                                                      57.58918
disembark_pointMontevideo                                                       58.64723
disembark_pointMontserrat, port unspecified                                     60.69314
disembark_pointMorant Bay                                                      138.41092
disembark_pointNassau                                                           72.70022
disembark_pointNevis, port unspecified                                         138.27026
disembark_pointNew Orleans                                                      66.01200
disembark_pointNew York                                                         65.29509
disembark_pointNewcastle (Nevis)                                                59.03359
disembark_pointNewport                                                         142.12322
disembark_pointNorth Carolina, port unspecified                                138.44035
disembark_pointNorth Potomac                                                    84.76865
disembark_pointOxford                                                           85.35008
disembark_pointPará                                                             59.65489
disembark_pointParaíba                                                          84.90376
disembark_pointParamaribo                                                       70.80739
disembark_pointParanaguá                                                        72.16754
disembark_pointParati                                                           92.35420
disembark_pointPatuxent                                                         65.37532
disembark_pointPernambuco, place unspecified                                    57.24112
disembark_pointPetit-Goâve                                                      68.21345
disembark_pointPhiladelphia                                                    105.59996
disembark_pointPonta Negro                                                      61.55853
disembark_pointPort-au-Prince                                                   57.06433
disembark_pointPort-de-Paix                                                     72.06340
disembark_pointPort Maria                                                       74.03882
disembark_pointPort Royal                                                       61.93381
disembark_pointPorto de Galinhas                                               138.24116
disembark_pointPortobelo                                                        63.52828
disembark_pointPuerto Padre                                                     76.62610
disembark_pointPuerto Rico, port unspecified                                    62.64991
disembark_pointRappahannock                                                     58.83628
disembark_pointRhode Island, port unspecified                                  105.72779
disembark_pointRio de Janeiro                                                   56.78017
disembark_pointRio de Janeiro province                                          59.29513
disembark_pointRio de Janeiro, Sao Paulo, Santa Catarina                        58.43456
disembark_pointRio de la Hacha                                                 138.67403
disembark_pointRio Grande do Norte                                             139.37745
disembark_pointRio Grande do Sul, place unspecified                            138.24720
disembark_pointRio Pongo                                                       139.14946
disembark_pointRio São Jeso                                                     84.77940
disembark_pointRoanoke                                                         138.63594
disembark_pointSagua                                                            74.26758
disembark_pointSaint-Domingue, then Haiti, port unspecified                     60.46965
disembark_pointSaint-Marc                                                       57.78317
disembark_pointSaint Ann's Bay                                                  92.31901
disembark_pointSaint John (Antigua)                                             57.08096
disembark_pointSamana                                                          138.25685
disembark_pointSanta Marta                                                     138.39691
disembark_pointSantiago de Cuba                                                 62.74596
disembark_pointSantos                                                           65.97234
disembark_pointSão Sebastião                                                    59.00510
disembark_pointSão Tomé                                                        105.89064
disembark_pointSavanna la Mar                                                   65.24294
disembark_pointSavannah                                                         59.10163
disembark_pointSenegambia and offshore Atlantic, port unspecified              138.60682
disembark_pointSouth Carolina, place unspecified                                76.49582
disembark_pointSouth Potomac                                                    67.25608
disembark_pointSpanish Americas, port unspecified                              138.38555
disembark_pointSpanish Caribbean, unspecified                                   92.40834
disembark_pointSpanish Circum-Caribbean,unspecified                             63.69170
disembark_pointSpanish Town                                                    106.54187
disembark_pointSt. Augustine                                                    84.87592
disembark_pointSt. Barthélemy, port unspecified                                105.72760
disembark_pointSt. Croix                                                        59.08288
disembark_pointSt. Eustatius                                                    59.70774
disembark_pointSt. Helena                                                       60.48671
disembark_pointSt. Kitts, port unspecified                                      57.22830
disembark_pointSt. Lucia, port unspecified                                      66.48667
disembark_pointSt. Maarten                                                     138.25700
disembark_pointSt. Thomas                                                       58.65940
disembark_pointSt. Vincent, port unspecified                                    57.37795
disembark_pointStabroek                                                        138.25063
disembark_pointSuriname, place unspecified                                      56.86169
disembark_pointTaipu                                                            66.68001
disembark_pointTenerife                                                        138.43729
disembark_pointTobago, port unspecified                                        138.21188
disembark_pointTortola, port unspecified                                        60.78486
disembark_pointTortuga                                                         138.21554
disembark_pointTrinidad and Tobago, place unspecified                           58.63303
disembark_pointTrinidad de Cuba                                                 65.29084
disembark_pointTybee Island                                                    138.41309
disembark_pointUbatuba                                                          92.38480
disembark_pointUpper James River                                                58.68547
disembark_pointUSA, location unspecified                                       105.64473
disembark_pointVeracruz                                                         58.77713
disembark_pointVirginia, port unspecified                                       59.10041
disembark_pointYork River                                                       57.51733
disembark_pointZion Hill                                                        61.72774
year_of_arrival_at_port_of_disembarkation                                        0.03979
                                                                              t value
(Intercept)                                                                    -1.519
place_of_purchaseAfrica, port unspecified                                      -1.072
place_of_purchaseAghway                                                         3.743
place_of_purchaseAlampo                                                         0.304
place_of_purchaseAlbreda                                                       -2.300
place_of_purchaseAlecuba                                                        2.051
place_of_purchaseAmbona                                                         1.665
place_of_purchaseAmbriz                                                         2.669
place_of_purchaseAndony                                                        -0.686
place_of_purchaseAnomabu                                                       -0.403
place_of_purchaseApammin                                                        1.483
place_of_purchaseArdra                                                          4.305
place_of_purchaseAxim                                                          -0.843
place_of_purchaseBadagry/Apa                                                    2.168
place_of_purchaseBanana Islands                                                -2.530
place_of_purchaseBance/Bunce Island                                            -1.200
place_of_purchaseBassa                                                         -0.870
place_of_purchaseBenguela                                                       3.488
place_of_purchaseBenin                                                         -1.472
place_of_purchaseBight of Benin, place unspecified                              1.911
place_of_purchaseBight of Biafra and Gulf of Guinea Islands, port unspecified   0.020
place_of_purchaseBights                                                        -1.074
place_of_purchaseBilbay                                                        -1.569
place_of_purchaseBimbia                                                        -1.477
place_of_purchaseBissagos                                                      -0.051
place_of_purchaseBissau                                                        -3.064
place_of_purchaseBoary                                                          1.067
place_of_purchaseBonny                                                          3.543
place_of_purchaseBundy                                                         -1.372
place_of_purchaseCabinda                                                        3.137
place_of_purchaseCacheu                                                        -3.062
place_of_purchaseCalabar                                                       -0.060
place_of_purchaseCameroons                                                     -1.044
place_of_purchaseCameroons River                                                0.255
place_of_purchaseCap Lopez                                                     -2.240
place_of_purchaseCape Coast Castle                                             -0.115
place_of_purchaseCape Lahou                                                    -2.035
place_of_purchaseCape Mole                                                     -1.273
place_of_purchaseCape Mount (Cape Grand Mount)                                 -1.715
place_of_purchaseCape Verde Islands                                            -1.027
place_of_purchaseCasamance                                                     -0.779
place_of_purchaseCess                                                          -1.008
place_of_purchaseChristiansborg                                                -1.571
place_of_purchaseCoanza River                                                   0.645
place_of_purchaseCongo North                                                    2.387
place_of_purchaseCongo River                                                    1.851
place_of_purchaseCorisco                                                       -1.531
place_of_purchaseCosta da Mina, place unspecified                               2.617
place_of_purchaseCosta de Africa (mainland coast around S Tome/Principe)       -0.863
place_of_purchaseCosta Leste Occidental                                        -2.054
place_of_purchaseDanish Gold Coast                                             -0.779
place_of_purchaseDelagoa                                                       -0.872
place_of_purchaseDembia                                                        -0.718
place_of_purchaseDrouin                                                        -0.043
place_of_purchaseElmina                                                         0.598
place_of_purchaseEpe                                                            1.435
place_of_purchaseEva                                                           -1.087
place_of_purchaseFormosa                                                       -1.153
place_of_purchaseGabon                                                         -4.614
place_of_purchaseGalam                                                         -1.898
place_of_purchaseGallinhas                                                     -0.454
place_of_purchaseGambia                                                        -3.556
place_of_purchaseGold Coast + Bight of Benin + Bight of Biafra                  0.153
place_of_purchaseGold Coast, Fr. definition                                    -0.059
place_of_purchaseGold Coast, port unspecified                                  -0.126
place_of_purchaseGorée                                                         -2.026
place_of_purchaseGrand Bassa                                                   -1.842
place_of_purchaseGrand Bassam                                                  -0.079
place_of_purchaseGrand Mesurado                                                -2.055
place_of_purchaseGrand Popo                                                     0.176
place_of_purchaseGrand Sestos                                                  -1.610
place_of_purchaseGrenada Point                                                  0.603
place_of_purchaseGulf of Guinea islands                                         0.449
place_of_purchaseIbo                                                            1.904
place_of_purchaseIfe                                                           -0.460
place_of_purchaseIles de Los                                                   -0.471
place_of_purchaseIles Plantain                                                 -0.598
place_of_purchaseInhambane                                                      3.110
place_of_purchaseIvory Coast                                                   -0.248
place_of_purchaseJacquin                                                        3.765
place_of_purchaseJoal, or Saloum River                                         -0.370
place_of_purchaseKeta                                                          -1.139
place_of_purchaseKilongo                                                        2.185
place_of_purchaseKilwa                                                         -1.064
place_of_purchaseKormantine                                                     0.456
place_of_purchaseLagos, Onim                                                    3.171
place_of_purchaseLay                                                            1.507
place_of_purchaseLegas                                                          0.133
place_of_purchaseLittle Bassa                                                  -1.142
place_of_purchaseLittle Junk                                                   -1.054
place_of_purchaseLittle Popo                                                   -0.187
place_of_purchaseLoango                                                         2.703
place_of_purchaseLourenço Marques                                               3.197
place_of_purchaseLuanda                                                         4.144
place_of_purchaseMadagascar                                                     0.616
place_of_purchaseMadeira                                                        0.229
place_of_purchaseMalembo                                                        2.196
place_of_purchaseMano                                                          -1.882
place_of_purchaseMascarene Islands                                             -0.479
place_of_purchaseMayumba                                                       -1.276
place_of_purchaseMomboza or Zanzibar                                            0.362
place_of_purchaseMozambique                                                     4.241
place_of_purchaseMpinda                                                        -0.066
place_of_purchaseNew Calabar                                                    0.373
place_of_purchaseNovo Redondo                                                   0.053
place_of_purchaseOerê                                                          -0.468
place_of_purchasePenido                                                        -2.036
place_of_purchasePetit Mesurado                                                -1.019
place_of_purchasePokesoe (Princes Town)                                        -0.895
place_of_purchasePopo                                                          -0.040
place_of_purchasePorto Novo                                                     2.747
place_of_purchasePortudal                                                      -0.491
place_of_purchasePortuguese Guinea                                              1.046
place_of_purchasePrinces Island                                                -2.359
place_of_purchaseQuaqua                                                        -1.342
place_of_purchaseQuicombo                                                      -0.833
place_of_purchaseQuilimane                                                      4.997
place_of_purchaseQuirimba                                                      -1.194
place_of_purchaseRio Nun                                                        0.437
place_of_purchaseRio Nunez                                                      0.130
place_of_purchaseRio Pongo                                                     -3.434
place_of_purchaseRio Zaire                                                     -0.691
place_of_purchaseRiver Brass                                                    0.278
place_of_purchaseRiver del Rey                                                 -0.962
place_of_purchaseRiver Kissey                                                  -1.579
place_of_purchaseSaint-Louis                                                   -2.883
place_of_purchaseSão Tomé                                                      -3.948
place_of_purchaseSão Tomé or Princes Island                                    -2.357
place_of_purchaseSassandra                                                      0.788
place_of_purchaseScarcies                                                      -1.471
place_of_purchaseSenegambia and offshore Atlantic, port unspecified            -2.824
place_of_purchaseSenegambia or Sierra Leone                                     0.223
place_of_purchaseSettra Kru                                                    -1.100
place_of_purchaseSherbro                                                       -1.685
place_of_purchaseSierra Leone estuary                                          -2.562
place_of_purchaseSierra Leone, port unspecified                                -2.811
place_of_purchaseSofala                                                        -0.679
place_of_purchaseSoutheast Africa and Indian Ocean islands, port unspecified    0.439
place_of_purchaseSoyo                                                          -0.534
place_of_purchaseSt. Paul                                                       0.398
place_of_purchaseSugary (Siekere)                                               0.063
place_of_purchaseTabou                                                          0.770
place_of_purchaseTrade Town                                                    -1.432
place_of_purchaseWest Central Africa and St. Helena, port unspecified           3.291
place_of_purchaseWhydah, Ouidah                                                 3.782
place_of_purchaseWiamba                                                        -0.238
place_of_purchaseWindward + Ivory + Gold + Benin                               -1.403
place_of_purchaseWindward Coast (Nunez - Assini)                               -1.320
place_of_purchaseWindward Coast, place unspecified                             -2.489
place_of_purchaseZanzibar                                                      -0.708
disembark_pointAccra                                                            0.117
disembark_pointAfrica, port unspecified                                        -0.887
disembark_pointAlagoas, place unspecified                                       1.992
disembark_pointAmelia Island                                                    0.208
disembark_pointAmericas, port unspecified                                       0.395
disembark_pointAnnapolis                                                       -0.587
disembark_pointAnnotto Bay                                                      0.377
disembark_pointAntigua, place unspecified                                       0.978
disembark_pointAntonia                                                          0.588
disembark_pointBahamas, port unspecified                                        0.590
disembark_pointBahia Honda                                                      3.952
disembark_pointBahia, place unspecified                                         1.194
disembark_pointBaía de Botafogo                                                 0.565
disembark_pointBaía de Sepetiba                                                 3.623
disembark_pointBanes                                                            2.413
disembark_pointBarbados, place unspecified                                      0.073
disembark_pointBasse-Terre                                                      0.729
disembark_pointBatabanó                                                        -1.274
disembark_pointBeaufort                                                         0.081
disembark_pointBenin                                                            0.630
disembark_pointBerbice                                                          1.357
disembark_pointBight of Biafra and Gulf of Guinea Islands, port unspecified    -0.423
disembark_pointBiloxi                                                           0.484
disembark_pointBlack River                                                      1.086
disembark_pointBonny                                                            0.632
disembark_pointBorburata                                                       -0.290
disembark_pointBoston                                                          -1.118
disembark_pointBristol                                                         -1.156
disembark_pointBritish Caribbean, colony unspecified                            0.821
disembark_pointBritish Honduras, port unspecified                               0.423
disembark_pointBritish Leewards                                                 0.659
disembark_pointBuenos Aires                                                     1.409
disembark_pointCabanas                                                          2.508
disembark_pointCabinda                                                          0.085
disembark_pointCabo de Búzios                                                   2.985
disembark_pointCabo Frio                                                        3.420
disembark_pointCadiz                                                           -0.313
disembark_pointCampos                                                           2.952
disembark_pointCananéia                                                         2.157
disembark_pointCanasí                                                           4.905
disembark_pointCap Français                                                     1.536
disembark_pointCape of Good Hope                                               -0.158
disembark_pointCaracas                                                          2.395
disembark_pointCardenas                                                         6.167
disembark_pointCaribbean (colony unspecified)                                   0.223
disembark_pointCartagena                                                       -0.323
disembark_pointCatuamo and Maria Farinha                                        2.713
disembark_pointCayenne                                                         -0.353
disembark_pointCayes (Les)                                                      0.879
disembark_pointCharleston                                                       0.201
disembark_pointCienfuegos                                                       0.332
disembark_pointCopacabana                                                      -0.097
disembark_pointCuba, port unspecified                                           2.322
disembark_pointCuba, south coast                                                2.415
disembark_pointCuba, west coast                                                 1.825
disembark_pointCul-de-Sac                                                       1.142
disembark_pointCumana                                                          -0.279
disembark_pointCumingsberg                                                      0.019
disembark_pointCuraçao                                                          2.928
disembark_pointDanish West Indies, colony unspecified                           0.777
disembark_pointDemerara                                                         1.037
disembark_pointDois Rios                                                        2.164
disembark_pointDominica, place unspecified                                      0.869
disembark_pointDutch Caribbean, colony unspecified                              0.203
disembark_pointDutch Guianas, colony unspecified                                0.647
disembark_pointEastern New Jersey                                              -0.469
disembark_pointEssequibo                                                        1.088
disembark_pointFalmouth (Jam.)                                                  0.995
disembark_pointFernando Po                                                      0.127
disembark_pointFlorida, port unspecified                                       -0.264
disembark_pointFort Dauphin                                                     1.365
disembark_pointFrance, place unspecified                                       -1.846
disembark_pointFreetown                                                        -0.129
disembark_pointFrench Africa (Goree or Senegal)                                -0.897
disembark_pointFrench Caribbean, colony unspecified                             0.782
disembark_pointGeorgia, port unspecified                                        0.326
disembark_pointGrenada, place unspecified                                       0.747
disembark_pointGuadeloupe, place unspecified                                    0.209
disembark_pointGuanimar                                                         2.436
disembark_pointGuayama                                                         -0.319
disembark_pointGuiana                                                           0.519
disembark_pointGustavia, St. Barthélemy                                        -1.032
disembark_pointHampton                                                         -0.578
disembark_pointHavana                                                           0.658
disembark_pointHispaniola, unspecified                                          0.345
disembark_pointIlha das Palmas                                                  1.570
disembark_pointIlha de Itamaric                                                 0.092
disembark_pointIlha de Lobes                                                    0.219
disembark_pointIlha de Marambaia                                                1.848
disembark_pointIlha de Paquetá                                                 -1.432
disembark_pointIlha Grande                                                      3.225
disembark_pointIsla de Pinas                                                    4.280
disembark_pointJacmel                                                           0.245
disembark_pointJamaica, place unspecified                                       1.099
disembark_pointJérémie                                                          0.037
disembark_pointKey West                                                         2.433
disembark_pointKingston                                                         1.293
disembark_pointKingston (Demerera)                                              0.620
disembark_pointLa Balise                                                        2.024
disembark_pointLa Guaira                                                        2.390
disembark_pointLe Havre                                                        -0.526
disembark_pointLéogane                                                          1.444
disembark_pointLiberia                                                          5.141
disembark_pointLisbon                                                          -0.507
disembark_pointLondontowne                                                      0.141
disembark_pointLouisiana                                                        0.072
disembark_pointLower James River                                               -0.520
disembark_pointLuanda                                                          -2.057
disembark_pointLucea (a) St. Lucea                                              0.211
disembark_pointMacaé                                                            2.809
disembark_pointMaceió                                                           1.577
disembark_pointMagari, Manzanillo                                               4.759
disembark_pointMangaratiba                                                      1.584
disembark_pointMaranhão                                                         0.740
disembark_pointMargarita                                                       -0.645
disembark_pointMaricá                                                           1.288
disembark_pointMariel                                                           2.825
disembark_pointMartha Brae                                                      0.422
disembark_pointMartinique, place unspecified                                    0.649
disembark_pointMaryland, port unspecified                                       0.211
disembark_pointMatanzas                                                         3.145
disembark_pointMatanzas province, south                                         3.776
disembark_pointMobile                                                          -1.310
disembark_pointMontego Bay                                                      1.421
disembark_pointMontevideo                                                      -0.461
disembark_pointMontserrat, port unspecified                                     0.152
disembark_pointMorant Bay                                                      -0.596
disembark_pointNassau                                                           0.801
disembark_pointNevis, port unspecified                                         -0.584
disembark_pointNew Orleans                                                      0.123
disembark_pointNew York                                                        -0.957
disembark_pointNewcastle (Nevis)                                               -0.001
disembark_pointNewport                                                         -0.419
disembark_pointNorth Carolina, port unspecified                                 0.874
disembark_pointNorth Potomac                                                    0.368
disembark_pointOxford                                                          -0.559
disembark_pointPará                                                             1.232
disembark_pointParaíba                                                         -1.139
disembark_pointParamaribo                                                       2.041
disembark_pointParanaguá                                                        3.453
disembark_pointParati                                                           1.365
disembark_pointPatuxent                                                         0.403
disembark_pointPernambuco, place unspecified                                    0.413
disembark_pointPetit-Goâve                                                      1.056
disembark_pointPhiladelphia                                                    -1.099
disembark_pointPonta Negro                                                      2.257
disembark_pointPort-au-Prince                                                   1.622
disembark_pointPort-de-Paix                                                    -0.529
disembark_pointPort Maria                                                       1.375
disembark_pointPort Royal                                                       1.192
disembark_pointPorto de Galinhas                                               -0.405
disembark_pointPortobelo                                                        1.369
disembark_pointPuerto Padre                                                     5.398
disembark_pointPuerto Rico, port unspecified                                    1.103
disembark_pointRappahannock                                                     0.022
disembark_pointRhode Island, port unspecified                                  -0.495
disembark_pointRio de Janeiro                                                   2.396
disembark_pointRio de Janeiro province                                          2.550
disembark_pointRio de Janeiro, Sao Paulo, Santa Catarina                        6.388
disembark_pointRio de la Hacha                                                  0.262
disembark_pointRio Grande do Norte                                              0.654
disembark_pointRio Grande do Sul, place unspecified                             0.345
disembark_pointRio Pongo                                                       -0.349
disembark_pointRio São Jeso                                                     1.194
disembark_pointRoanoke                                                         -0.551
disembark_pointSagua                                                            3.466
disembark_pointSaint-Domingue, then Haiti, port unspecified                     0.844
disembark_pointSaint-Marc                                                       1.332
disembark_pointSaint Ann's Bay                                                 -0.552
disembark_pointSaint John (Antigua)                                             0.488
disembark_pointSamana                                                          -1.348
disembark_pointSanta Marta                                                     -1.060
disembark_pointSantiago de Cuba                                                 1.656
disembark_pointSantos                                                           3.818
disembark_pointSão Sebastião                                                    3.199
disembark_pointSão Tomé                                                        -0.323
disembark_pointSavanna la Mar                                                   0.643
disembark_pointSavannah                                                        -0.548
disembark_pointSenegambia and offshore Atlantic, port unspecified              -0.796
disembark_pointSouth Carolina, place unspecified                                0.556
disembark_pointSouth Potomac                                                   -0.626
disembark_pointSpanish Americas, port unspecified                              -0.235
disembark_pointSpanish Caribbean, unspecified                                   0.888
disembark_pointSpanish Circum-Caribbean,unspecified                             0.514
disembark_pointSpanish Town                                                     0.438
disembark_pointSt. Augustine                                                   -0.302
disembark_pointSt. Barthélemy, port unspecified                                -0.478
disembark_pointSt. Croix                                                        0.630
disembark_pointSt. Eustatius                                                    2.653
disembark_pointSt. Helena                                                       2.910
disembark_pointSt. Kitts, port unspecified                                      0.523
disembark_pointSt. Lucia, port unspecified                                      0.847
disembark_pointSt. Maarten                                                     -0.678
disembark_pointSt. Thomas                                                      -0.249
disembark_pointSt. Vincent, port unspecified                                    0.698
disembark_pointStabroek                                                         0.116
disembark_pointSuriname, place unspecified                                      1.650
disembark_pointTaipu                                                            2.922
disembark_pointTenerife                                                        -0.151
disembark_pointTobago, port unspecified                                        -0.171
disembark_pointTortola, port unspecified                                        0.890
disembark_pointTortuga                                                          1.350
disembark_pointTrinidad and Tobago, place unspecified                           0.856
disembark_pointTrinidad de Cuba                                                 1.986
disembark_pointTybee Island                                                    -0.636
disembark_pointUbatuba                                                          2.769
disembark_pointUpper James River                                                0.692
disembark_pointUSA, location unspecified                                       -0.068
disembark_pointVeracruz                                                        -0.657
disembark_pointVirginia, port unspecified                                       0.331
disembark_pointYork River                                                       0.033
disembark_pointZion Hill                                                        1.315
year_of_arrival_at_port_of_disembarkation                                       4.766
                                                                              Pr(>|t|)
(Intercept)                                                                   0.128805
place_of_purchaseAfrica, port unspecified                                     0.283524
place_of_purchaseAghway                                                       0.000182
place_of_purchaseAlampo                                                       0.760858
place_of_purchaseAlbreda                                                      0.021482
place_of_purchaseAlecuba                                                      0.040259
place_of_purchaseAmbona                                                       0.095896
place_of_purchaseAmbriz                                                       0.007610
place_of_purchaseAndony                                                       0.492836
place_of_purchaseAnomabu                                                      0.686706
place_of_purchaseApammin                                                      0.137995
place_of_purchaseArdra                                                        1.68e-05
place_of_purchaseAxim                                                         0.399412
place_of_purchaseBadagry/Apa                                                  0.030173
place_of_purchaseBanana Islands                                               0.011420
place_of_purchaseBance/Bunce Island                                           0.230306
place_of_purchaseBassa                                                        0.384304
place_of_purchaseBenguela                                                     0.000487
place_of_purchaseBenin                                                        0.141136
place_of_purchaseBight of Benin, place unspecified                            0.056068
place_of_purchaseBight of Biafra and Gulf of Guinea Islands, port unspecified 0.984070
place_of_purchaseBights                                                       0.282874
place_of_purchaseBilbay                                                       0.116657
place_of_purchaseBimbia                                                       0.139618
place_of_purchaseBissagos                                                     0.959539
place_of_purchaseBissau                                                       0.002188
place_of_purchaseBoary                                                        0.286134
place_of_purchaseBonny                                                        0.000396
place_of_purchaseBundy                                                        0.170017
place_of_purchaseCabinda                                                      0.001711
place_of_purchaseCacheu                                                       0.002204
place_of_purchaseCalabar                                                      0.952393
place_of_purchaseCameroons                                                    0.296358
place_of_purchaseCameroons River                                              0.798735
place_of_purchaseCap Lopez                                                    0.025118
place_of_purchaseCape Coast Castle                                            0.908817
place_of_purchaseCape Lahou                                                   0.041853
place_of_purchaseCape Mole                                                    0.203116
place_of_purchaseCape Mount (Cape Grand Mount)                                0.086444
place_of_purchaseCape Verde Islands                                           0.304348
place_of_purchaseCasamance                                                    0.435741
place_of_purchaseCess                                                         0.313369
place_of_purchaseChristiansborg                                               0.116285
place_of_purchaseCoanza River                                                 0.519104
place_of_purchaseCongo North                                                  0.016994
place_of_purchaseCongo River                                                  0.064233
place_of_purchaseCorisco                                                      0.125714
place_of_purchaseCosta da Mina, place unspecified                             0.008891
place_of_purchaseCosta de Africa (mainland coast around S Tome/Principe)      0.388043
place_of_purchaseCosta Leste Occidental                                       0.039945
place_of_purchaseDanish Gold Coast                                            0.436260
place_of_purchaseDelagoa                                                      0.383248
place_of_purchaseDembia                                                       0.472645
place_of_purchaseDrouin                                                       0.965713
place_of_purchaseElmina                                                       0.549963
place_of_purchaseEpe                                                          0.151301
place_of_purchaseEva                                                          0.277098
place_of_purchaseFormosa                                                      0.248947
place_of_purchaseGabon                                                        3.98e-06
place_of_purchaseGalam                                                        0.057662
place_of_purchaseGallinhas                                                    0.649687
place_of_purchaseGambia                                                       0.000378
place_of_purchaseGold Coast + Bight of Benin + Bight of Biafra                0.878333
place_of_purchaseGold Coast, Fr. definition                                   0.953308
place_of_purchaseGold Coast, port unspecified                                 0.899556
place_of_purchaseGorée                                                        0.042779
place_of_purchaseGrand Bassa                                                  0.065442
place_of_purchaseGrand Bassam                                                 0.937379
place_of_purchaseGrand Mesurado                                               0.039865
place_of_purchaseGrand Popo                                                   0.859957
place_of_purchaseGrand Sestos                                                 0.107457
place_of_purchaseGrenada Point                                                0.546333
place_of_purchaseGulf of Guinea islands                                       0.653188
place_of_purchaseIbo                                                          0.056950
place_of_purchaseIfe                                                          0.645225
place_of_purchaseIles de Los                                                  0.637917
place_of_purchaseIles Plantain                                                0.549731
place_of_purchaseInhambane                                                    0.001872
place_of_purchaseIvory Coast                                                  0.803803
place_of_purchaseJacquin                                                      0.000167
place_of_purchaseJoal, or Saloum River                                        0.711044
place_of_purchaseKeta                                                         0.254664
place_of_purchaseKilongo                                                      0.028888
place_of_purchaseKilwa                                                        0.287311
place_of_purchaseKormantine                                                   0.648489
place_of_purchaseLagos, Onim                                                  0.001520
place_of_purchaseLay                                                          0.131862
place_of_purchaseLegas                                                        0.894236
place_of_purchaseLittle Bassa                                                 0.253584
place_of_purchaseLittle Junk                                                  0.292010
place_of_purchaseLittle Popo                                                  0.851291
place_of_purchaseLoango                                                       0.006888
place_of_purchaseLourenço Marques                                             0.001390
place_of_purchaseLuanda                                                       3.43e-05
place_of_purchaseMadagascar                                                   0.537962
place_of_purchaseMadeira                                                      0.819143
place_of_purchaseMalembo                                                      0.028078
place_of_purchaseMano                                                         0.059886
place_of_purchaseMascarene Islands                                            0.632148
place_of_purchaseMayumba                                                      0.201848
place_of_purchaseMomboza or Zanzibar                                          0.717566
place_of_purchaseMozambique                                                   2.24e-05
place_of_purchaseMpinda                                                       0.947408
place_of_purchaseNew Calabar                                                  0.709368
place_of_purchaseNovo Redondo                                                 0.957628
place_of_purchaseOerê                                                         0.639603
place_of_purchasePenido                                                       0.041779
place_of_purchasePetit Mesurado                                               0.308112
place_of_purchasePokesoe (Princes Town)                                       0.370564
place_of_purchasePopo                                                         0.968067
place_of_purchasePorto Novo                                                   0.006017
place_of_purchasePortudal                                                     0.623378
place_of_purchasePortuguese Guinea                                            0.295479
place_of_purchasePrinces Island                                               0.018321
place_of_purchaseQuaqua                                                       0.179563
place_of_purchaseQuicombo                                                     0.404752
place_of_purchaseQuilimane                                                    5.89e-07
place_of_purchaseQuirimba                                                     0.232591
place_of_purchaseRio Nun                                                      0.662004
place_of_purchaseRio Nunez                                                    0.896750
place_of_purchaseRio Pongo                                                    0.000597
place_of_purchaseRio Zaire                                                    0.489869
place_of_purchaseRiver Brass                                                  0.780827
place_of_purchaseRiver del Rey                                                0.335823
place_of_purchaseRiver Kissey                                                 0.114454
place_of_purchaseSaint-Louis                                                  0.003944
place_of_purchaseSão Tomé                                                     7.93e-05
place_of_purchaseSão Tomé or Princes Island                                   0.018435
place_of_purchaseSassandra                                                    0.430878
place_of_purchaseScarcies                                                     0.141411
place_of_purchaseSenegambia and offshore Atlantic, port unspecified           0.004753
place_of_purchaseSenegambia or Sierra Leone                                   0.823770
place_of_purchaseSettra Kru                                                   0.271459
place_of_purchaseSherbro                                                      0.092012
place_of_purchaseSierra Leone estuary                                         0.010403
place_of_purchaseSierra Leone, port unspecified                               0.004940
place_of_purchaseSofala                                                       0.497135
place_of_purchaseSoutheast Africa and Indian Ocean islands, port unspecified  0.660431
place_of_purchaseSoyo                                                         0.593347
place_of_purchaseSt. Paul                                                     0.690884
place_of_purchaseSugary (Siekere)                                             0.949838
place_of_purchaseTabou                                                        0.441111
place_of_purchaseTrade Town                                                   0.152163
place_of_purchaseWest Central Africa and St. Helena, port unspecified         0.001000
place_of_purchaseWhydah, Ouidah                                               0.000156
place_of_purchaseWiamba                                                       0.812219
place_of_purchaseWindward + Ivory + Gold + Benin                              0.160505
place_of_purchaseWindward Coast (Nunez - Assini)                              0.186997
place_of_purchaseWindward Coast, place unspecified                            0.012808
place_of_purchaseZanzibar                                                     0.478921
disembark_pointAccra                                                          0.907141
disembark_pointAfrica, port unspecified                                       0.375221
disembark_pointAlagoas, place unspecified                                     0.046393
disembark_pointAmelia Island                                                  0.835295
disembark_pointAmericas, port unspecified                                     0.693143
disembark_pointAnnapolis                                                      0.557412
disembark_pointAnnotto Bay                                                    0.706077
disembark_pointAntigua, place unspecified                                     0.327889
disembark_pointAntonia                                                        0.556338
disembark_pointBahamas, port unspecified                                      0.555370
disembark_pointBahia Honda                                                    7.78e-05
disembark_pointBahia, place unspecified                                       0.232491
disembark_pointBaía de Botafogo                                               0.572396
disembark_pointBaía de Sepetiba                                               0.000292
disembark_pointBanes                                                          0.015833
disembark_pointBarbados, place unspecified                                    0.942205
disembark_pointBasse-Terre                                                    0.465811
disembark_pointBatabanó                                                       0.202542
disembark_pointBeaufort                                                       0.935129
disembark_pointBenin                                                          0.528887
disembark_pointBerbice                                                        0.174866
disembark_pointBight of Biafra and Gulf of Guinea Islands, port unspecified   0.672505
disembark_pointBiloxi                                                         0.628054
disembark_pointBlack River                                                    0.277458
disembark_pointBonny                                                          0.527572
disembark_pointBorburata                                                      0.772040
disembark_pointBoston                                                         0.263428
disembark_pointBristol                                                        0.247508
disembark_pointBritish Caribbean, colony unspecified                          0.411677
disembark_pointBritish Honduras, port unspecified                             0.672461
disembark_pointBritish Leewards                                               0.509939
disembark_pointBuenos Aires                                                   0.158909
disembark_pointCabanas                                                        0.012145
disembark_pointCabinda                                                        0.932412
disembark_pointCabo de Búzios                                                 0.002844
disembark_pointCabo Frio                                                      0.000627
disembark_pointCadiz                                                          0.754143
disembark_pointCampos                                                         0.003165
disembark_pointCananéia                                                       0.031006
disembark_pointCanasí                                                         9.45e-07
disembark_pointCap Français                                                   0.124511
disembark_pointCape of Good Hope                                              0.874322
disembark_pointCaracas                                                        0.016622
disembark_pointCardenas                                                       7.11e-10
disembark_pointCaribbean (colony unspecified)                                 0.823700
disembark_pointCartagena                                                      0.746510
disembark_pointCatuamo and Maria Farinha                                      0.006673
disembark_pointCayenne                                                        0.724049
disembark_pointCayes (Les)                                                    0.379179
disembark_pointCharleston                                                     0.840860
disembark_pointCienfuegos                                                     0.739632
disembark_pointCopacabana                                                     0.922508
disembark_pointCuba, port unspecified                                         0.020241
disembark_pointCuba, south coast                                              0.015748
disembark_pointCuba, west coast                                               0.068068
disembark_pointCul-de-Sac                                                     0.253278
disembark_pointCumana                                                         0.780370
disembark_pointCumingsberg                                                    0.984521
disembark_pointCuraçao                                                        0.003415
disembark_pointDanish West Indies, colony unspecified                         0.437085
disembark_pointDemerara                                                       0.299843
disembark_pointDois Rios                                                      0.030496
disembark_pointDominica, place unspecified                                    0.384662
disembark_pointDutch Caribbean, colony unspecified                            0.839363
disembark_pointDutch Guianas, colony unspecified                              0.517907
disembark_pointEastern New Jersey                                             0.639381
disembark_pointEssequibo                                                      0.276606
disembark_pointFalmouth (Jam.)                                                0.319796
disembark_pointFernando Po                                                    0.898987
disembark_pointFlorida, port unspecified                                      0.791836
disembark_pointFort Dauphin                                                   0.172163
disembark_pointFrance, place unspecified                                      0.064883
disembark_pointFreetown                                                       0.897649
disembark_pointFrench Africa (Goree or Senegal)                               0.369899
disembark_pointFrench Caribbean, colony unspecified                           0.434105
disembark_pointGeorgia, port unspecified                                      0.744191
disembark_pointGrenada, place unspecified                                     0.455222
disembark_pointGuadeloupe, place unspecified                                  0.834475
disembark_pointGuanimar                                                       0.014854
disembark_pointGuayama                                                        0.749639
disembark_pointGuiana                                                         0.603430
disembark_pointGustavia, St. Barthélemy                                       0.301939
disembark_pointHampton                                                        0.563210
disembark_pointHavana                                                         0.510432
disembark_pointHispaniola, unspecified                                        0.730096
disembark_pointIlha das Palmas                                                0.116457
disembark_pointIlha de Itamaric                                               0.926734
disembark_pointIlha de Lobes                                                  0.826327
disembark_pointIlha de Marambaia                                              0.064585
disembark_pointIlha de Paquetá                                                0.152285
disembark_pointIlha Grande                                                    0.001261
disembark_pointIsla de Pinas                                                  1.88e-05
disembark_pointJacmel                                                         0.806508
disembark_pointJamaica, place unspecified                                     0.271863
disembark_pointJérémie                                                        0.970578
disembark_pointKey West                                                       0.014997
disembark_pointKingston                                                       0.195890
disembark_pointKingston (Demerera)                                            0.535117
disembark_pointLa Balise                                                      0.043028
disembark_pointLa Guaira                                                      0.016858
disembark_pointLe Havre                                                       0.598880
disembark_pointLéogane                                                        0.148619
disembark_pointLiberia                                                        2.76e-07
disembark_pointLisbon                                                         0.612222
disembark_pointLondontowne                                                    0.887916
disembark_pointLouisiana                                                      0.942843
disembark_pointLower James River                                              0.603030
disembark_pointLuanda                                                         0.039693
disembark_pointLucea (a) St. Lucea                                            0.832845
disembark_pointMacaé                                                          0.004971
disembark_pointMaceió                                                         0.114776
disembark_pointMagari, Manzanillo                                             1.97e-06
disembark_pointMangaratiba                                                    0.113123
disembark_pointMaranhão                                                       0.459567
disembark_pointMargarita                                                      0.519148
disembark_pointMaricá                                                         0.197866
disembark_pointMariel                                                         0.004737
disembark_pointMartha Brae                                                    0.672722
disembark_pointMartinique, place unspecified                                  0.516483
disembark_pointMaryland, port unspecified                                     0.833002
disembark_pointMatanzas                                                       0.001665
disembark_pointMatanzas province, south                                       0.000160
disembark_pointMobile                                                         0.190260
disembark_pointMontego Bay                                                    0.155277
disembark_pointMontevideo                                                     0.645120
disembark_pointMontserrat, port unspecified                                   0.879034
disembark_pointMorant Bay                                                     0.550853
disembark_pointNassau                                                         0.423134
disembark_pointNevis, port unspecified                                        0.558969
disembark_pointNew Orleans                                                    0.901727
disembark_pointNew York                                                       0.338796
disembark_pointNewcastle (Nevis)                                              0.999366
disembark_pointNewport                                                        0.675479
disembark_pointNorth Carolina, port unspecified                               0.382100
disembark_pointNorth Potomac                                                  0.713051
disembark_pointOxford                                                         0.576205
disembark_pointPará                                                           0.217952
disembark_pointParaíba                                                        0.254815
disembark_pointParamaribo                                                     0.041232
disembark_pointParanaguá                                                      0.000557
disembark_pointParati                                                         0.172416
disembark_pointPatuxent                                                       0.687157
disembark_pointPernambuco, place unspecified                                  0.679731
disembark_pointPetit-Goâve                                                    0.290763
disembark_pointPhiladelphia                                                   0.271681
disembark_pointPonta Negro                                                    0.023995
disembark_pointPort-au-Prince                                                 0.104866
disembark_pointPort-de-Paix                                                   0.596807
disembark_pointPort Maria                                                     0.169263
disembark_pointPort Royal                                                     0.233177
disembark_pointPorto de Galinhas                                              0.685268
disembark_pointPortobelo                                                      0.170870
disembark_pointPuerto Padre                                                   6.84e-08
disembark_pointPuerto Rico, port unspecified                                  0.270155
disembark_pointRappahannock                                                   0.982290
disembark_pointRhode Island, port unspecified                                 0.620929
disembark_pointRio de Janeiro                                                 0.016605
disembark_pointRio de Janeiro province                                        0.010781
disembark_pointRio de Janeiro, Sao Paulo, Santa Catarina                      1.73e-10
disembark_pointRio de la Hacha                                                0.793614
disembark_pointRio Grande do Norte                                            0.512868
disembark_pointRio Grande do Sul, place unspecified                           0.730376
disembark_pointRio Pongo                                                      0.726926
disembark_pointRio São Jeso                                                   0.232395
disembark_pointRoanoke                                                        0.581355
disembark_pointSagua                                                          0.000530
disembark_pointSaint-Domingue, then Haiti, port unspecified                   0.398471
disembark_pointSaint-Marc                                                     0.182928
disembark_pointSaint Ann's Bay                                                0.580730
disembark_pointSaint John (Antigua)                                           0.625631
disembark_pointSamana                                                         0.177676
disembark_pointSanta Marta                                                    0.289341
disembark_pointSantiago de Cuba                                               0.097806
disembark_pointSantos                                                         0.000135
disembark_pointSão Sebastião                                                  0.001384
disembark_pointSão Tomé                                                       0.747038
disembark_pointSavanna la Mar                                                 0.520267
disembark_pointSavannah                                                       0.583863
disembark_pointSenegambia and offshore Atlantic, port unspecified             0.426241
disembark_pointSouth Carolina, place unspecified                              0.578243
disembark_pointSouth Potomac                                                  0.531272
disembark_pointSpanish Americas, port unspecified                             0.814177
disembark_pointSpanish Caribbean, unspecified                                 0.374718
disembark_pointSpanish Circum-Caribbean,unspecified                           0.607202
disembark_pointSpanish Town                                                   0.661164
disembark_pointSt. Augustine                                                  0.762548
disembark_pointSt. Barthélemy, port unspecified                               0.632409
disembark_pointSt. Croix                                                      0.528617
disembark_pointSt. Eustatius                                                  0.007981
disembark_pointSt. Helena                                                     0.003625
disembark_pointSt. Kitts, port unspecified                                    0.600950
disembark_pointSt. Lucia, port unspecified                                    0.397282
disembark_pointSt. Maarten                                                    0.497727
disembark_pointSt. Thomas                                                     0.803380
disembark_pointSt. Vincent, port unspecified                                  0.485180
disembark_pointStabroek                                                       0.907433
disembark_pointSuriname, place unspecified                                    0.098881
disembark_pointTaipu                                                          0.003488
disembark_pointTenerife                                                       0.880054
disembark_pointTobago, port unspecified                                       0.863851
disembark_pointTortola, port unspecified                                      0.373432
disembark_pointTortuga                                                        0.177110
disembark_pointTrinidad and Tobago, place unspecified                         0.392023
disembark_pointTrinidad de Cuba                                               0.047036
disembark_pointTybee Island                                                   0.524803
disembark_pointUbatuba                                                        0.005637
disembark_pointUpper James River                                              0.488790
disembark_pointUSA, location unspecified                                      0.945444
disembark_pointVeracruz                                                       0.511267
disembark_pointVirginia, port unspecified                                     0.740573
disembark_pointYork River                                                     0.973951
disembark_pointZion Hill                                                      0.188376
year_of_arrival_at_port_of_disembarkation                                     1.90e-06
                                                                                 
(Intercept)                                                                      
place_of_purchaseAfrica, port unspecified                                        
place_of_purchaseAghway                                                       ***
place_of_purchaseAlampo                                                          
place_of_purchaseAlbreda                                                      *  
place_of_purchaseAlecuba                                                      *  
place_of_purchaseAmbona                                                       .  
place_of_purchaseAmbriz                                                       ** 
place_of_purchaseAndony                                                          
place_of_purchaseAnomabu                                                         
place_of_purchaseApammin                                                         
place_of_purchaseArdra                                                        ***
place_of_purchaseAxim                                                            
place_of_purchaseBadagry/Apa                                                  *  
place_of_purchaseBanana Islands                                               *  
place_of_purchaseBance/Bunce Island                                              
place_of_purchaseBassa                                                           
place_of_purchaseBenguela                                                     ***
place_of_purchaseBenin                                                           
place_of_purchaseBight of Benin, place unspecified                            .  
place_of_purchaseBight of Biafra and Gulf of Guinea Islands, port unspecified    
place_of_purchaseBights                                                          
place_of_purchaseBilbay                                                          
place_of_purchaseBimbia                                                          
place_of_purchaseBissagos                                                        
place_of_purchaseBissau                                                       ** 
place_of_purchaseBoary                                                           
place_of_purchaseBonny                                                        ***
place_of_purchaseBundy                                                           
place_of_purchaseCabinda                                                      ** 
place_of_purchaseCacheu                                                       ** 
place_of_purchaseCalabar                                                         
place_of_purchaseCameroons                                                       
place_of_purchaseCameroons River                                                 
place_of_purchaseCap Lopez                                                    *  
place_of_purchaseCape Coast Castle                                               
place_of_purchaseCape Lahou                                                   *  
place_of_purchaseCape Mole                                                       
place_of_purchaseCape Mount (Cape Grand Mount)                                .  
place_of_purchaseCape Verde Islands                                              
place_of_purchaseCasamance                                                       
place_of_purchaseCess                                                            
place_of_purchaseChristiansborg                                                  
place_of_purchaseCoanza River                                                    
place_of_purchaseCongo North                                                  *  
place_of_purchaseCongo River                                                  .  
place_of_purchaseCorisco                                                         
place_of_purchaseCosta da Mina, place unspecified                             ** 
place_of_purchaseCosta de Africa (mainland coast around S Tome/Principe)         
place_of_purchaseCosta Leste Occidental                                       *  
place_of_purchaseDanish Gold Coast                                               
place_of_purchaseDelagoa                                                         
place_of_purchaseDembia                                                          
place_of_purchaseDrouin                                                          
place_of_purchaseElmina                                                          
place_of_purchaseEpe                                                             
place_of_purchaseEva                                                             
place_of_purchaseFormosa                                                         
place_of_purchaseGabon                                                        ***
place_of_purchaseGalam                                                        .  
place_of_purchaseGallinhas                                                       
place_of_purchaseGambia                                                       ***
place_of_purchaseGold Coast + Bight of Benin + Bight of Biafra                   
place_of_purchaseGold Coast, Fr. definition                                      
place_of_purchaseGold Coast, port unspecified                                    
place_of_purchaseGorée                                                        *  
place_of_purchaseGrand Bassa                                                  .  
place_of_purchaseGrand Bassam                                                    
place_of_purchaseGrand Mesurado                                               *  
place_of_purchaseGrand Popo                                                      
place_of_purchaseGrand Sestos                                                    
place_of_purchaseGrenada Point                                                   
place_of_purchaseGulf of Guinea islands                                          
place_of_purchaseIbo                                                          .  
place_of_purchaseIfe                                                             
place_of_purchaseIles de Los                                                     
place_of_purchaseIles Plantain                                                   
place_of_purchaseInhambane                                                    ** 
place_of_purchaseIvory Coast                                                     
place_of_purchaseJacquin                                                      ***
place_of_purchaseJoal, or Saloum River                                           
place_of_purchaseKeta                                                            
place_of_purchaseKilongo                                                      *  
place_of_purchaseKilwa                                                           
place_of_purchaseKormantine                                                      
place_of_purchaseLagos, Onim                                                  ** 
place_of_purchaseLay                                                             
place_of_purchaseLegas                                                           
place_of_purchaseLittle Bassa                                                    
place_of_purchaseLittle Junk                                                     
place_of_purchaseLittle Popo                                                     
place_of_purchaseLoango                                                       ** 
place_of_purchaseLourenço Marques                                             ** 
place_of_purchaseLuanda                                                       ***
place_of_purchaseMadagascar                                                      
place_of_purchaseMadeira                                                         
place_of_purchaseMalembo                                                      *  
place_of_purchaseMano                                                         .  
place_of_purchaseMascarene Islands                                               
place_of_purchaseMayumba                                                         
place_of_purchaseMomboza or Zanzibar                                             
place_of_purchaseMozambique                                                   ***
place_of_purchaseMpinda                                                          
place_of_purchaseNew Calabar                                                     
place_of_purchaseNovo Redondo                                                    
place_of_purchaseOerê                                                            
place_of_purchasePenido                                                       *  
place_of_purchasePetit Mesurado                                                  
place_of_purchasePokesoe (Princes Town)                                          
place_of_purchasePopo                                                            
place_of_purchasePorto Novo                                                   ** 
place_of_purchasePortudal                                                        
place_of_purchasePortuguese Guinea                                               
place_of_purchasePrinces Island                                               *  
place_of_purchaseQuaqua                                                          
place_of_purchaseQuicombo                                                        
place_of_purchaseQuilimane                                                    ***
place_of_purchaseQuirimba                                                        
place_of_purchaseRio Nun                                                         
place_of_purchaseRio Nunez                                                       
place_of_purchaseRio Pongo                                                    ***
place_of_purchaseRio Zaire                                                       
place_of_purchaseRiver Brass                                                     
place_of_purchaseRiver del Rey                                                   
place_of_purchaseRiver Kissey                                                    
place_of_purchaseSaint-Louis                                                  ** 
place_of_purchaseSão Tomé                                                     ***
place_of_purchaseSão Tomé or Princes Island                                   *  
place_of_purchaseSassandra                                                       
place_of_purchaseScarcies                                                        
place_of_purchaseSenegambia and offshore Atlantic, port unspecified           ** 
place_of_purchaseSenegambia or Sierra Leone                                      
place_of_purchaseSettra Kru                                                      
place_of_purchaseSherbro                                                      .  
place_of_purchaseSierra Leone estuary                                         *  
place_of_purchaseSierra Leone, port unspecified                               ** 
place_of_purchaseSofala                                                          
place_of_purchaseSoutheast Africa and Indian Ocean islands, port unspecified     
place_of_purchaseSoyo                                                            
place_of_purchaseSt. Paul                                                        
place_of_purchaseSugary (Siekere)                                                
place_of_purchaseTabou                                                           
place_of_purchaseTrade Town                                                      
place_of_purchaseWest Central Africa and St. Helena, port unspecified         ** 
place_of_purchaseWhydah, Ouidah                                               ***
place_of_purchaseWiamba                                                          
place_of_purchaseWindward + Ivory + Gold + Benin                                 
place_of_purchaseWindward Coast (Nunez - Assini)                                 
place_of_purchaseWindward Coast, place unspecified                            *  
place_of_purchaseZanzibar                                                        
disembark_pointAccra                                                             
disembark_pointAfrica, port unspecified                                          
disembark_pointAlagoas, place unspecified                                     *  
disembark_pointAmelia Island                                                     
disembark_pointAmericas, port unspecified                                        
disembark_pointAnnapolis                                                         
disembark_pointAnnotto Bay                                                       
disembark_pointAntigua, place unspecified                                        
disembark_pointAntonia                                                           
disembark_pointBahamas, port unspecified                                         
disembark_pointBahia Honda                                                    ***
disembark_pointBahia, place unspecified                                          
disembark_pointBaía de Botafogo                                                  
disembark_pointBaía de Sepetiba                                               ***
disembark_pointBanes                                                          *  
disembark_pointBarbados, place unspecified                                       
disembark_pointBasse-Terre                                                       
disembark_pointBatabanó                                                          
disembark_pointBeaufort                                                          
disembark_pointBenin                                                             
disembark_pointBerbice                                                           
disembark_pointBight of Biafra and Gulf of Guinea Islands, port unspecified      
disembark_pointBiloxi                                                            
disembark_pointBlack River                                                       
disembark_pointBonny                                                             
disembark_pointBorburata                                                         
disembark_pointBoston                                                            
disembark_pointBristol                                                           
disembark_pointBritish Caribbean, colony unspecified                             
disembark_pointBritish Honduras, port unspecified                                
disembark_pointBritish Leewards                                                  
disembark_pointBuenos Aires                                                      
disembark_pointCabanas                                                        *  
disembark_pointCabinda                                                           
disembark_pointCabo de Búzios                                                 ** 
disembark_pointCabo Frio                                                      ***
disembark_pointCadiz                                                             
disembark_pointCampos                                                         ** 
disembark_pointCananéia                                                       *  
disembark_pointCanasí                                                         ***
disembark_pointCap Français                                                      
disembark_pointCape of Good Hope                                                 
disembark_pointCaracas                                                        *  
disembark_pointCardenas                                                       ***
disembark_pointCaribbean (colony unspecified)                                    
disembark_pointCartagena                                                         
disembark_pointCatuamo and Maria Farinha                                      ** 
disembark_pointCayenne                                                           
disembark_pointCayes (Les)                                                       
disembark_pointCharleston                                                        
disembark_pointCienfuegos                                                        
disembark_pointCopacabana                                                        
disembark_pointCuba, port unspecified                                         *  
disembark_pointCuba, south coast                                              *  
disembark_pointCuba, west coast                                               .  
disembark_pointCul-de-Sac                                                        
disembark_pointCumana                                                            
disembark_pointCumingsberg                                                       
disembark_pointCuraçao                                                        ** 
disembark_pointDanish West Indies, colony unspecified                            
disembark_pointDemerara                                                          
disembark_pointDois Rios                                                      *  
disembark_pointDominica, place unspecified                                       
disembark_pointDutch Caribbean, colony unspecified                               
disembark_pointDutch Guianas, colony unspecified                                 
disembark_pointEastern New Jersey                                                
disembark_pointEssequibo                                                         
disembark_pointFalmouth (Jam.)                                                   
disembark_pointFernando Po                                                       
disembark_pointFlorida, port unspecified                                         
disembark_pointFort Dauphin                                                      
disembark_pointFrance, place unspecified                                      .  
disembark_pointFreetown                                                          
disembark_pointFrench Africa (Goree or Senegal)                                  
disembark_pointFrench Caribbean, colony unspecified                              
disembark_pointGeorgia, port unspecified                                         
disembark_pointGrenada, place unspecified                                        
disembark_pointGuadeloupe, place unspecified                                     
disembark_pointGuanimar                                                       *  
disembark_pointGuayama                                                           
disembark_pointGuiana                                                            
disembark_pointGustavia, St. Barthélemy                                          
disembark_pointHampton                                                           
disembark_pointHavana                                                            
disembark_pointHispaniola, unspecified                                           
disembark_pointIlha das Palmas                                                   
disembark_pointIlha de Itamaric                                                  
disembark_pointIlha de Lobes                                                     
disembark_pointIlha de Marambaia                                              .  
disembark_pointIlha de Paquetá                                                   
disembark_pointIlha Grande                                                    ** 
disembark_pointIsla de Pinas                                                  ***
disembark_pointJacmel                                                            
disembark_pointJamaica, place unspecified                                        
disembark_pointJérémie                                                           
disembark_pointKey West                                                       *  
disembark_pointKingston                                                          
disembark_pointKingston (Demerera)                                               
disembark_pointLa Balise                                                      *  
disembark_pointLa Guaira                                                      *  
disembark_pointLe Havre                                                          
disembark_pointLéogane                                                           
disembark_pointLiberia                                                        ***
disembark_pointLisbon                                                            
disembark_pointLondontowne                                                       
disembark_pointLouisiana                                                         
disembark_pointLower James River                                                 
disembark_pointLuanda                                                         *  
disembark_pointLucea (a) St. Lucea                                               
disembark_pointMacaé                                                          ** 
disembark_pointMaceió                                                            
disembark_pointMagari, Manzanillo                                             ***
disembark_pointMangaratiba                                                       
disembark_pointMaranhão                                                          
disembark_pointMargarita                                                         
disembark_pointMaricá                                                            
disembark_pointMariel                                                         ** 
disembark_pointMartha Brae                                                       
disembark_pointMartinique, place unspecified                                     
disembark_pointMaryland, port unspecified                                        
disembark_pointMatanzas                                                       ** 
disembark_pointMatanzas province, south                                       ***
disembark_pointMobile                                                            
disembark_pointMontego Bay                                                       
disembark_pointMontevideo                                                        
disembark_pointMontserrat, port unspecified                                      
disembark_pointMorant Bay                                                        
disembark_pointNassau                                                            
disembark_pointNevis, port unspecified                                           
disembark_pointNew Orleans                                                       
disembark_pointNew York                                                          
disembark_pointNewcastle (Nevis)                                                 
disembark_pointNewport                                                           
disembark_pointNorth Carolina, port unspecified                                  
disembark_pointNorth Potomac                                                     
disembark_pointOxford                                                            
disembark_pointPará                                                              
disembark_pointParaíba                                                           
disembark_pointParamaribo                                                     *  
disembark_pointParanaguá                                                      ***
disembark_pointParati                                                            
disembark_pointPatuxent                                                          
disembark_pointPernambuco, place unspecified                                     
disembark_pointPetit-Goâve                                                       
disembark_pointPhiladelphia                                                      
disembark_pointPonta Negro                                                    *  
disembark_pointPort-au-Prince                                                    
disembark_pointPort-de-Paix                                                      
disembark_pointPort Maria                                                        
disembark_pointPort Royal                                                        
disembark_pointPorto de Galinhas                                                 
disembark_pointPortobelo                                                         
disembark_pointPuerto Padre                                                   ***
disembark_pointPuerto Rico, port unspecified                                     
disembark_pointRappahannock                                                      
disembark_pointRhode Island, port unspecified                                    
disembark_pointRio de Janeiro                                                 *  
disembark_pointRio de Janeiro province                                        *  
disembark_pointRio de Janeiro, Sao Paulo, Santa Catarina                      ***
disembark_pointRio de la Hacha                                                   
disembark_pointRio Grande do Norte                                               
disembark_pointRio Grande do Sul, place unspecified                              
disembark_pointRio Pongo                                                         
disembark_pointRio São Jeso                                                      
disembark_pointRoanoke                                                           
disembark_pointSagua                                                          ***
disembark_pointSaint-Domingue, then Haiti, port unspecified                      
disembark_pointSaint-Marc                                                        
disembark_pointSaint Ann's Bay                                                   
disembark_pointSaint John (Antigua)                                              
disembark_pointSamana                                                            
disembark_pointSanta Marta                                                       
disembark_pointSantiago de Cuba                                               .  
disembark_pointSantos                                                         ***
disembark_pointSão Sebastião                                                  ** 
disembark_pointSão Tomé                                                          
disembark_pointSavanna la Mar                                                    
disembark_pointSavannah                                                          
disembark_pointSenegambia and offshore Atlantic, port unspecified                
disembark_pointSouth Carolina, place unspecified                                 
disembark_pointSouth Potomac                                                     
disembark_pointSpanish Americas, port unspecified                                
disembark_pointSpanish Caribbean, unspecified                                    
disembark_pointSpanish Circum-Caribbean,unspecified                              
disembark_pointSpanish Town                                                      
disembark_pointSt. Augustine                                                     
disembark_pointSt. Barthélemy, port unspecified                                  
disembark_pointSt. Croix                                                         
disembark_pointSt. Eustatius                                                  ** 
disembark_pointSt. Helena                                                     ** 
disembark_pointSt. Kitts, port unspecified                                       
disembark_pointSt. Lucia, port unspecified                                       
disembark_pointSt. Maarten                                                       
disembark_pointSt. Thomas                                                        
disembark_pointSt. Vincent, port unspecified                                     
disembark_pointStabroek                                                          
disembark_pointSuriname, place unspecified                                    .  
disembark_pointTaipu                                                          ** 
disembark_pointTenerife                                                          
disembark_pointTobago, port unspecified                                          
disembark_pointTortola, port unspecified                                         
disembark_pointTortuga                                                           
disembark_pointTrinidad and Tobago, place unspecified                            
disembark_pointTrinidad de Cuba                                               *  
disembark_pointTybee Island                                                      
disembark_pointUbatuba                                                        ** 
disembark_pointUpper James River                                                 
disembark_pointUSA, location unspecified                                         
disembark_pointVeracruz                                                          
disembark_pointVirginia, port unspecified                                        
disembark_pointYork River                                                        
disembark_pointZion Hill                                                         
year_of_arrival_at_port_of_disembarkation                                     ***
---
Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1

Residual standard error: 126.1 on 15912 degrees of freedom
  (11687 observations deleted due to missingness)
Multiple R-squared:  0.3599,    Adjusted R-squared:  0.3453 
F-statistic: 24.72 on 362 and 15912 DF,  p-value: < 2.2e-16

Linear Equation

Captives Arrived at 1st Port = point of disembark + place of purchase - 141.41

Filtering Meaningful Disembark Point

voyage2 <- voyage_nona |>
  filter(disembark_point %in% c("Ouidah ", "Cap Français", "Cabo Frio", "Baía de Sepetiba", "Bahia Honda", "Catuamo and Maria Farinha", "Campos", "Cabo Frio", "Cabo de Búzios"))

This filtering chunk includes the most significant disembark points (including points that fit the *** and ** criteria).

Creating my Graph

# Aggregate data in case there are multiple voyages per year/disembark point
library(ggplot2)
library(dplyr)

# Aggregate data
voyage_agg <- voyage2 |>
  group_by(year_of_arrival_at_port_of_disembarkation, disembark_point) |>
  summarise(captives = sum(captives_arrived_at_1st_port, na.rm = TRUE), .groups = "drop")

# Histogram
voyage_hist <- voyage_agg |>
  ggplot(aes(
    x = year_of_arrival_at_port_of_disembarkation,
    fill = disembark_point,
    weight = captives
  )) +
  geom_histogram(
    position = "identity",
    alpha = 0.5,
    binwidth = 5,
    color = "white"
  ) +
  scale_fill_manual(
    values = c(
      "Ouidah" = "#050066",
      "Cap Français" = "#5b55d4",
      "Cabo Frio" = "#3d8a40",          
      "Baía de Sepetiba" = "#fab575",
      "Bahia Honda" = "#bc72c4",
      "Catuamo and Maria Farinha" = "#e32dac", 
      "Campos" = "#4e84f2",
      "Cabo de Búzios" = "#f2e05a"
    ),
    name = "Disembark Point"
  ) +
  labs(
    x = "Year of Disembarkation",
    y = "Number of Captives",
    title = "Histogram of Captives by Disembarkation Point Over Years",
    caption = "SlaveVoyage.org"
  ) +
  theme_light()

voyage_hist

Making Year Into Period

## This creates periods out of years but is not necessary for this graph
#voyage2 <- voyage_nona|>
 # mutate(period = cut(year_of_arrival_at_port_of_disembarkation, 
                  #    breaks = c(1500, 1650, 1750, 1850, 1900),
              #   labels = c("1500-1650", "1650-1750", "1750-1850", "1850-1900"))) #making a new variable to explain period

I was testing how to make alluvials and during the process I tried making the time into periods. Alluvials actually need continuous data for time-flow but it was an interesting way to make a new variable of periods. I believe it’s a good skill to have learned to better understand that I may keep under my belt while coding in the future.

Ending Essay

I cleaned my dataset by renaming long variable names. To make the names more uniform and to reduce the risk of spelling mistakes during coding, I also removed spaces and uppercase lettering. For the actual data, I removed N/As only from the variables I planned to use for my analysis, filtering them out with exclamation marks. Removing N/As from every variable felt unnecessary, since I wouldn’t be using all the data. After cleaning, I created a histogram illustrating the number of captives arriving at different ports over time, with each color representing a specific disembarkation point. Some ports, like Cap Français, consistently received large numbers, while others appear only in select years, reflecting shifts in trade routes or colonial activities. Notably, at certain times, multiple ports peak simultaneously, revealing periods of intense transatlantic slave trafficking. As a result, the plot provides a clear visual sense of which ports were most active and how disembarkation patterns shifted over the decades. I originally wanted to create an alluvial diagram, but found the categorical values difficult to represent as flows. This challenge arose because my values weren’t easily translated into an alluvial flow. In the future, I hope to learn how to select variables more strategically to enable different forms of visualization. I also notice that the scaling for the graph is a bit large, but I’m not completely sure the best way to show the significance of the large data points without understating or belittling the smaller chunks of data. Another flaw I noticed in my transition from data to the histogram is a loss of significant places of disembarkation I previously listed out in the filtering to make “voyage2”. Instead of 8 places of disembarkation, the graph only lists 7.