John Hamilton Mortimer, ‘Successful Monster’, 1778, National Gallery of Art, Washington, D.C.
plate: 30 x 20.2 cm (11 13/16 x 7 15/16 in.)  sheet: 41 x 29.2 cm (16 1/8 x 11 1/2 in.)  overall (mat size): 40.6 x 55.9 cm (16 x 22 in.)

About John Hamilton Mortimer