License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Honoré Daumier. Mr. et Mme. Prudhomme revenant de la foire..., from Croquis Parisiens, published in Le Charivari, April 18, 1857, April 18, 1857. The Metropolitan Museum of Art.