Performed During the Years 1785, 1786, and 1787, in the Western Countries of that Continent, Comprised Between Cape Blanco in Barbary, Situated in 200 47' and Cape Palmas, in 40 30' North Latitude. Embellished with a General Map of Africa, Corrected According to the Most Authentic and Recent Observations; and Several Plans, Copper-plates, &c