“ The practical result of a friendship formed in 1805 with William Spence, of Hull, was the jointly written Introduction to Entomology (4 vols., 1815–1826; 7th ed., 1856) , one of the most popular books of science that have ever appeared. In 1830 he was chosen to write one of the Bridgewater Treatises, his subject being The History, Habits, and Instincts of Animals (2 vols., 1835) . This undeniably fell short of his earlier works in point of scientific value. He died on the 4th of July 1850. ”