Relief shown pictorially. Prime meridian: Island de Fer. Coordinates approximate and based on Greenwich meridian. Bar scale on map given in "Lieues Marines de France." Legend at bottom left. Inland map depicts kingdoms of Central Africa with rivers & mountain ranges and two areas of silver mines in the Botswana region (Royaume d'Abutua ou Toroa and Royaume de Chicova). Histoire Generale Des Voyages, ou, Nouvelle Collection de Toutes Les Relations de Voyages par mer et par terre; Abbé Prévost, and John Green [Paris: Didot, 1747-1780]. Printed beneath map frame: "Tome IV in 4o. No. 15" (lower left) and "Tome 3 in 8o. Page 368"(lower right).