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

The anatomy and philosophy of expression.
By: Bell, Charles.
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 17 Page 18 Page 117 Page 126 Page 167 Page 251 Page 257 Page 283 Page 346
Elements of physiology.
By: Müller, Johannes. - Baly, W.
Publication info: London :Taylor & Walton,1838-1842.
Volume: v.1
Pages: Page 818 Page 819 Page 933