Detail of Philosophy, after Raphael, Vatican Palace, Rome, Italy

Graphite on paper

Graphite on cream wove paper

Black crayon on thin ivory wove paper

Black ink, charcoal, and watercolor pencil on cream laid paper

Charcoal and graphite on off-white laid paper

Ink and brown pencil on white wove paper

Black ink on white illustration board

Black ink and charcoal on beige laid paper

Black ink on off-white wove paper

Ink on paper

Black and blue ink on off-white wove paper

Black conté crayon on cream wove paper