License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Honoré Daumier. Pardon my friend..... let's verify my powers before yours!, from 'News of the day,' published in Le Charivari, July 16, 1869, July 16, 1869. The Metropolitan Museum of Art.