License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Henry William Bunbury. Four Scenes: How to Stop your Horse at Pleasure; Geoffrey Gombado Esq-r.; How to Ride up Hyde Park; A Bit of Blood, 1787 or later. The Metropolitan Museum of Art.