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. An uncut sheet printed on both sides with pages from "Juan Ceniza" (cuento arreglado por C. S. Suarez) and "Rosendito, los leones y el sapo" (cuento por C. S. Suarez), ca. 1900–1910. The Metropolitan Museum of Art.