David Cox the Elder, ‘Mountain Heights, Cader Idris’, ca. 1850, National Gallery of Art, Washington, D.C.
Overall: 47.7 x 74.6 cm (18 3/4 x 29 3/8 in.)  overall (mat size): 59.7 x 85.7 cm (23 1/2 x 33 3/4 in.)