From Benguella to the Territory of Yacca. Description of a Journey into Central and West Africa. Comprising Narratives, Adventures, and Important Surveys of the Sources of the Rivers Cunene, Cubango, Luando, Cuanza, and Cuango and of Great Part of the Course of the Two Latter. Together with the Discovery of the Rivers Hamba, Cauali, Sussa and Cugho, and a detailed Account of the Territories of Quiteca N'bungo, Sosso, Futa and Yacca. Vol. I