License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Robert Charles Dudley. The Cliffs, Foilhummerum Bay, Valentia, the Point at Which the Shore-end of the Cable was Landed on July 22nd, 1865, 1865. The Metropolitan Museum of Art.