13 Pages in Charles Darwin's Library associated with "mental states - anxiety"

The anatomy and philosophy of expression
By: Bell, Charles, Sir,
Publication info: London, John Murray, 1844
Pages: Page 189
De la physionomie et des mouvements d'expression
By: Gratiolet, Pierre.
Publication info: Paris, J. Hetzel, 1865
Pages: Page 18 Page 17 Page 117 Page 126 Page 167 Page 251 Page 257 Page 283 Page 346
Elements of physiology
By: Müller, Johannes, - Baly, William,
Publication info: London, Taylor & Walton, 1838-1842
Volume: v.1
Pages: Page 818 Page 819 Page 933