License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Honoré Daumier. –Are you going to open the door of the cage? –Indeed.... I am going to repaint it, from 'News of the day,' published in "Le Charivari", March 22, 1870. The Metropolitan Museum of Art.