Eugène Cuvelier, ‘A Rock in the Forest’, ca. 1865, National Gallery of Art, Washington, D.C.
sheet (trimmed to image): 19.9 x 25.7 cm (7 13/16 x 10 1/8 in.)  support: 35.1 x 41.3 cm (13 13/16 x 16 1/4 in.)