License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
José Guadalupe Posada. Skeletons hawking their wares and shouting about teetotalers, drunkards, old men and kids, tomcats and working girls, ca. 1900–1910. The Metropolitan Museum of Art.