7 Pages in Charles Darwin's Library associated with "mental states - painful emotion"

De la physionomie et de la parole.
By: Lemoine, Albert.
Publication info: Paris :Germer Baillière,1865.
Pages: Page 62
Elements of physiology.
By: Müller, Johannes. - Baly, William,
Publication info: London :Taylor & Walton,1838-1842.
Volume: v.2
Pages: Page 1701
Mécanisme de la physionomie humaine, ou analyse électro-physiologique de l'expression des passions.
By: Duchenne, G.-B. (Guillaume-Benjamin),
Publication info: Paris :Jules Renouard,1862.
Pages: Page 36 Page 43 Page 44 Page 53 Page 180