License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Honoré Daumier. And you, what do you like best at this year's Salon? The beer!, from 'The public at the exhibition,' published in Le Petit Journal pour Rire, June 18, 1864, June 18, 1864. The Metropolitan Museum of Art.