The J. Paul Getty Museum
License, verbatimCC0
The J. Paul Getty Museum: image dedicated to the public domain under Creative Commons Zero (CC0), stated on the media record itself ('Rights for Media'), with download clearance.
Guillaume-Benjamin Duchenne. Mécanisme de la Physionomie Humaine ou Analyse Électro-Physiologique de l'Expression des Passions, 1876. The J. Paul Getty Museum.