Dumbarton Rock; Etched by Joseph Mallord William Turner; 1775-1851; British; Engraved by Thomas Goff Lupton; 1791-1873; British; after Joseph Mallord William Turner; 1775-1851; British; between 1813 and 1823; Etching and mezzotint; printed in brown ink Engraver's proof (e) on moderately thick; slightly textured; cream laid paper; Sheet: 11 3/8 x 17 inches (28.9 x 43.2 cm); Plate: 8 3/4 x 11 3/8 inches (22.2 x 28.9 cm); and Image: 7 3/4 x 10 1/2 inches (19.7 x 26.7 cm)