Another drawing from my Nadar book. The original photo for this one is entitled: Dr. Duchenne and Adrien Tournachon, Amazement, illustration for Mécanisme de la physionomie humaine, 1854
I gather from the title that this was an illustration for a set of expressions in some sort of medical physiology book. There are a number of other similar photos of this man and others making wild expressions, usually with an offscreen hand holding calipers to their face to show size or measure extent. Kind of creepy really.