Frédéric Cazenave after Louis-Léopold Boilly, ‘L'Optique (The Optical Viewer)’, ca. 1793, National Gallery of Art, Washington, D.C.
plate: 55 x 45 cm (21 5/8 x 17 11/16 in.)  sheet: 55.9 x 47.8 cm (22 x 18 13/16 in.)