Fecundity

Goat's Horn with Red

Sphere No. 6 (Sphere within a Sphere)

Black Hills with Cedar

Study No. 5

Black City

Untitled (New York)

Landscape No. 6

Soft Gray, Alcalde Hill

Traveler's Column

Homage to a Cosmonaut No. 1

Drawing after Eakins's Painting of Samuel Murray