Attributed to Carlo Baldassare Simelli, ‘Cloud Study, Roman Compagna’, ca. 1860, National Gallery of Art, Washington, D.C.
sheet: 18.9 x 26.4 cm (7 7/16 x 10 3/8 in.)  support: 24.3 x 31.6 cm (9 9/16 x 12 7/16 in.)