Henslow, John Stevens (1796-1861), was born at Rochester and educated there and at Cambridge, where he graduated BA. in 1818 and M.A. in 1821. He became professor of mineralogy in 1822, and of botany in 1825, and did much to render science popular in the university. His most distinguished pupil was Charles Darwin, whom he recommended to accompany the Beagle, but from whose distinctive tenets he differed to the last. In 1832 he became vicar of Cholsey, Berkshire, and in 1837 of Hitcham, Suffolk, where he died. Here he distinguished himself by introducing popular science-teaching into his village-schools and by other philanthropic efforts. He also took a leading part in establishing the Ipswich Museum and that of Economic Botany at Kew.