License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Honoré Daumier. Amélioration qui ne tardera pas a être apportée aux théâtres de Paris pendant la canicule., from Croquis d'Été, published in Le Charivari, August 16-17, 1859, August 16–17, 1859. The Metropolitan Museum of Art.