An Account of Travels Into the Interior of Southern Africa, in the Years 1797 and 1798:: Including Cursory Observations on the Geology and Geography of the Southern Part of that Continent; the Natural History of Such Objects as Occurred in the Animal, Vegetable, and Mineral Kingdoms; and Sketches on the Physical and Moral Characters of the Various Tribes of Inhabitants Surrounding the Settlement of the Cape of Good Hope. : To which is Annexed, a Description of the Present State, Population and Produce of that Extensive Colony; with a Map, Constructed Entirely from Actual Observations, Made in the Course of the Travels