License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Thomas Rowlandson. Caricature Medallions for Screens &c: A Morning Visitor, An Evening Visitor, A Welcome Visitor, A Noon Visitor, A Night Visitor, An Unwelcome Visitor, April 1, 1800. The Metropolitan Museum of Art.