Mental Evolution in Animals: With a Posthumous Essay on Instinct by Charles Darwin

George John Romanes (1848–94), considered by The Times to be 'the biological investigator upon whom in England the mantle of Mr. Darwin has most conspicuously descended', wrote this influential work on the evolution of the mental faculties of animals in 1883. The two scientists were close friends, and Darwin gave Romanes his notes on psychology to use in his studies. Much of the book is devoted to instinct, and contained in the appendix is a posthumous essay by Darwin on the subject, origin...