License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
James McNeill Whistler. Man with Donkey and Reclining Boy (Recto); Two Areas Blocked in Blue: Head of Man, Female Head and Head (Verso) (from Sketchbook), 1854–55. The Metropolitan Museum of Art.