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. Skeleton firing a canon, from a broadside entitled 'De este famoso hipodromo en la pista, no faltara ni un solo periodista', published by Antonio Vanegas Arroyo., ca. 1889–1895. The Metropolitan Museum of Art.