Charles-Melchior Descourtis after Friedrich Rosenberg after Johann Heinrich Troll, ‘Falls of Schaffhausen’, ca. 1784, National Gallery of Art, Washington, D.C.
plate: 32.2 x 44.8 cm (12 11/16 x 17 5/8 in.)  overall (outer framing line): 23.6 x 32.4 cm (9 5/16 x 12 3/4 in.)