Lake of Thun, Swiss (Liber Studiorum, part III, plate 15), June 10, 1808, Etching, drypoint and mezzotint; first state of three, plate: 7 3/16 x 10 7/16 in. (18.3 x 26.5 cm), Prints, Designed and etched by Joseph Mallord William Turner (British, Lond