American activities in the central Pacific, 1790-1870 : a history, geography, and ethnography pertaining to American involvement and Americans in the Pacific taken from contemporary newspapers etc.
Travels, in the interior districts of Africa : performed under the direction and patronage of the African Association, in the years 1795, 1796, and 1797.
Missionary travels and researches in South Africa : including a sketch of sixteen years' residence in the interior of Africa, and a journey from the Cape of Good Hope to Loanda on the west coast; thence across the continent, down the River Zambesi, to the eastern ocean