One as Two & More: Ascending & Descending Arrows II1978 · Felt-tip pen and colored pencil on two sheets of transparentized graph papereach: 11 3/4 × 16 1/2" (29.8 × 41.9 cm)Museum of Modern Art
WattsOSSRSix Rotated Positions on a Vertical Plane1978 · Black and red inks on vellum23 5/16 × 22 9/16 in. (59.2 × 57.3 cm)The Metropolitan Museum of Art
Bunker Hill Monument1875 · Albumen print (carte-de-visite)Image: 8.9 × 5.7 cm (3 9/16 × 2 1/4 in.); Card: 10.4 × 6.4 cm (4 1/8 × 2 9/16 in.)Art Institute of Chicago