License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Honoré Daumier. Having had the ambitious idea to outswim the train, from 'The bathers,' published in Le Petit Journal pour Rire, August 6, 1864, August 6, 1864. The Metropolitan Museum of Art.