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The earth and its inhabitants ...
Huxley memorial lectures to the University of Birmingham
Personal narrative of travels to the equinoctial regions of America during the years 1799 - 1804
The farmer's guide; or, A treatise on the improvement of wheat
Travels in the interior districts of Africa : performed under the direction and patronage of the African Association, in the years 1795, 1796, and 17…
The Great Rift Valley : being the narrative of a journey to Mount Kenya and Lake Baringo : with some account of the geology, natural history, anthrop…
Three visits to Madagascar during the years 1853-1854-1856 : including a journey to the capital : with notices of the natural history of the country …
Personal life of David Livingstone, chiefly from his unpublished journals and correspondance in the possession of his famil
Letters of Asa Gray
Madagascar : its history and people