The Expression of the Emotions in Man and Animals research; simple psychology experiments on the recognition of emotions with his friends and family; and (borrowing from Duchenne de Boulogne, a physician at the Salpêtrière) the use of photographs in his presentation of scientific information. Publisher John Murray warned Darwin that including the photographs would "poke a hole in the profits" of the book; and "The Expression of the Emotions" is an important landmark in the history of book illustration. Background: In the weeks before Queen Victoria's coronation in 1838, Charles Darwin sought medical advice on his mysterious physical symptoms, and then travelled to Scotland for a period of rest
The Variation of Animals and Plants under Domestication grown too long, & I think I shall publish separately a very small volume, 'an essay on the origin of mankind'". This "essay" would become two books: "The Descent of Man, and Selection in Relation to Sex" (1871) and "The Expression of Emotions in Man and Animals" (1872). The book had been advertised as early as 1865 with the unwieldy title "Domesticated Animals and Cultivated Plants, or the Principles of Variation, Inheritance, Reversion, Crossing, Interbreeding, and Selection under Domestication" but Darwin agreed to the shorter "The Variation of Animals and Plants Under Domestication" suggested by the compositors. By May he