Slide the column left or right and release the mouse. To see Voyage Details , click on the row or column header to get a complete listing of variables for that particular voyage. Click SAVE button. Type in a name for the current query and click OK . The sample number of voyages will change as not all voyages have complete documentation of all variables.
Red square indicates ports frequented by at least two slaving voyages.
Ports are grouped into broad slave-trading regions or colonies. Dark green shading illustrates the approximate slaving frontiers. The size of the shaded area approximates the relative volume of the regional slave trades. Senegal River and, in the18th century, the Congo River. For certain markets, the sample of voyages is large enough to illustrate general patterns of slave-trading, notably British, French, and Dutch voyages in the 18th century.