4 Pages in Charles Darwin's Library associated with "mental states - depression"

The anatomy and philosophy of expression
By: Bell, Charles, Sir,
Publication info: London, John Murray, 1844
Pages: Page 102 Page 140 Page 172
The physiology or mechanism of blushing
By: Burgess, Thomas H. (Thomas Henry),
Publication info: London, John Churchill, 1839
Pages: Page 180