License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Honoré Daumier. Étude de révérence pour le quadrille des lanciers, from Actualités, publlished in Le Charivari, March 30, 1857, March 30, 1857. The Metropolitan Museum of Art.