5 Pages in Charles Darwin's Library associated with "mental states - horror"

The anatomy and philosophy of expression
By: Bell, Charles, Sir,
Publication info: London, John Murray, 1844
Pages: Page 169
De la physionomie et des mouvements d'expression
By: Gratiolet, Pierre,
Publication info: Paris, J. Hetzel, 1865
Pages: Page 26 Page 104 Page 105
Wissenschaftliches System der Mimik und Physiognomik
By: Piderit, T.
Publication info: Detmold, Klingenberg, 1867
Pages: Page 74