Before 1816, the area around Cape Mesurado and the mouth of the Mesurado River was called Ducor. It had long been established as a crossroads and place of trade, and was inhabited by fishing, trading and farming communities of various ethnicities, including the Dey, Kru, Bassa, Gola, and Vai. The French cartographer and slave trader Chevalier des Marchais visited Ducor and the Cape in 1723, conducted business there and later published a map of the area.