Expression of the emotions in man and animals [...] With photographic and other illustrations.

Bookseller Notes

'This is an important member of the evolutionary set, and it was written, in part at least, as a confutation of the idea that the facial muscles of expression in man were a special endowment. ' (Freeman) 'This work of Darwin's is the foundation of that aspect of the study of animan behaviour that goes by the name of ethology... he made a direct contribution to psychology.' (Gavin de Beer. Charles Darwin. p.225) It was the only work by Darwin to be illustrated with photographs, and one of the first to feature heliotypes.