Darwin a member of the Plinian Society, of Edinburgh ; makes
natural history excursions ; his first scientific paper read March, 27, 1827; friendship with Dr. Grant ; Jameson's. lectures on zoology ; Darwin enters Christ's College, Camo bridge, in 1828; his friendship with Prof. Henslow ; his account of Henslow ; Darwin at this time specially an entomologist ; his excursions with Henslow ; takes B.A. degree in 1831, M.A. in 1837 ; voyage of Beagle proposed, and Darwin appointed as naturalist; the Beagle sails on Dec. 27, 1831 ; Darwin's letters to Henslow published 1835 ; 1832, Darwin at Teneriffe, Cape de Verde Islands, St. Paul's Rocks, Bahia, Rio de Janeiro (April); excursions into interior and amusing adventures ; his experiences and horror of slavery ; at Monte Video, July ; Maldonado,,
Confusion in description of species ; labours of Professors Owen
and Huxley ; Darwin's ideas on the origin of species germi- nated during the voyage of the Beagle ; he collected facts, 1837-42 ; drew up a sketch, 1842; enlarged it in 1844 ; previous speculations on the subject ; views of Erasmus Darwin, Geoffroy St. Hilaire, and Lamarck ; Darwin's opinion of Lamarck; influence of Lyell ; influence of