The expression of the emotions in man and animals. Charles Darwin, London, 1872
From the introduction
MANY works have been written on Expression, but a greater number on Physiognomy,—that is, on the recognition of character through the study of the permanent form of the features. With this latter subject I am not here concerned. The older treatises, (1) which I have consulted, have been of little or no service to me. The famous 'Conférences' (2) of the painter Le Brun, published in 1667, is the best known ancient work, and contains some good remarks. Another somewhat old essay, namely, the 'Discours,' delivered 1774-1782, by the well-known Dutch anatomist Camper, (3) can hardly be considered as having made any marked advance in the subject. The following works, on the contrary, deserve the fullest consideration.
1) J. Parsons, in his paper in the Appendix to the 'Philosophical Transactions' for 1746, p. 41, gives a list of forty-one old authors who have written on Expression.
2) 'Conférences sur l'expression des différents Caractères des Passions,' Paris, 4to, 1667. I always quote from the republication of the 'Conférences' in the edition of Lavater, by Moreau, which appeared in 1820, as given in vol. ix. p. 257.
3) 'Discours par Pierre Camper sur le moyen de représenter les diverses passions,' &c. 1792.