A Naturalist's Voyage Round the World

A Naturalist's Voyage Round the World : The Voyage of the Beagle, Plus Journal of Researches into the  Natural History and Geology of the countries visited during the voyage round the world of H.M.S. Beagle     by Charles Darwin (1839)

The grand old man of modern biology was a gentleman of leisure, a crack shot, and no scientist when, at 22, he boarded the Beagle for its long survey voyage to South America and the Pacific. His record of the trip is rich in anthropology and science. (His shipmates called him "the Fly-catcher.") The adventure comes in watching over Darwin's shoulder as he works out the first glimmerings of his theory of evolution.