Study for portrait of Derek Bok against panelled wall with President's chair

Colored pencil on buff wove paper

Graphite and red pencil on tan wove paper; verso: graphite on tan wove paper

Red and white chalk on gray modern laid paper

Graphite and charcoal on off-white wove paper

Watercolor over graphite on off-white wove paper

Graphite on off-white wove paper

Graphite, gouache, crayon, and silver and black ink on white wove paper

Opaque and transparent watercolor on white wove paper

Watercolor on cream wove paper

Watercolor over graphite on off-white wove paper

Watercolor and white gouache over graphite on off-white wove paper

Graphite and ink ; graphite on paper