Untitled (soldiers in jungle during fighting in central highlands near Dak To, Vietnam)

Untitled (girl looking at flower display)

Yellow tulips

Untitled (helicopter flying into clearing near top of Hill 882, central highlands near Dak To, Vietnam)

["Grotesque," 1954, watercolor by Lyonel Feininger]

Toy Train

[Cloud study, Brookfield, Massachusetts]

Fungus

Still life close-up

Untitled (collapsed bridge, Hue, Vietnam)

Untitled (hot air balloon)

[Watercolor by Lyonel Feininger, 1938]

Untitled (Chinook helicopter lifting 105mm howitzer silhouetted against sun and low clouds, Vietnam)