Charles Demuth, Man Standing on Dunes / Verso: Landscape, Maine, (1909–1910), Oil on paperboard; recto: 10 x 8 in. (25.4 x 20.3 cm) verso: 8 x 10 in. (20.3 x 25.4 cm), Hirshhorn Museum and Sculpture Garden, Washington, D.C. https://dartabase.art/cite/smithsonian/ld1-1643399857816-1643399859510-1