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. A woman reading a note while a man in the background looks over his shoulder at her, illustration for 'Coleccion de Cartas Amorosas Cuaderno No. 7', ca. 1880–1910 (a later impression). The Metropolitan Museum of Art.