Anatomy study of two heads for portrait of Derek Bok : one showing musculature, one of skull

Ink on paper

Black ink on off-white wove paper

Oil over graphite on off-white wove paper

Black and colored crayons on paper

Colored pencil, graphite, and black ink on cream wove paper; verso: watercolor and graphite

Graphite on paper

Graphite on off-white wove paper

Graphite on thin off-white wove paper

Black ink, watercolor, and metallic paint over graphite on heavy buff wove paper

Black ink on cream wove paper

Oil on off-white wove paper

Graphite on tan wove paper