Contemplation, 1966, charcoal on paper, uf: 30" x 22.25"

Untitled, 1968, charcoal on paper, 22.25" x 30"

Penumpra, 1969, charcoal on paper, 30" x 22.5"

Contemplation, 1966, charcoal on paper, uf: 30" x 22.25"