Mallard Duck. Dated: 1834. Dimensions: plate: 65.4 x 97.2 cm (25 3/4 x 38 1/4 in.) sheet: 68.3 x 68 cm (26 7/8 x 26 3/4 in.). Medium: hand-colored engraving and aquatint on Whatman wove paper. Museum: National Gallery of Art, Washington DC. Author: R