Study for portrait of Derek Bok with terra cotta Madonna: seated figure facing right next to President's chair

Graphite on paper

Graphite on paper

Graphite with extensive erasure, rubbing and scratchwork on off-white wove paper

Black ink on tan wove paper

Red, black, brown and white conté crayon on ivory tracing paper

Black and red chalk on white wove sketchbook paper

Black ink over graphite on off-white laid paper

Graphite on off-white wove paper

Graphite and charcoal on off-white wove paper

Graphite on off-white wove paper

Tempera? on textured gold paper

Ink on paper