License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
John Warner Barber. A History of the Amistad Captives: Being a Circumstantial Account of the Capture of the Spanish Schooner Amistad, by the Africans on Board; Their Voyage, and Capture near Long Island, New York; with Biographical Sketches of Each of the Surviving Africans., 1840. The Metropolitan Museum of Art.