Details from the Legend of the True Cross, after Piero della Francesca; verso: Sketch and color wheel with notes

Crayon on paper

Black ink and watercolor on white laid paper

Graphite on cream laid paper

Graphite on paper

Colored crayons on paper

Charcoal and white chalk on gray-brown wove paper

Transparent watercolor and black ink on cream wove paper

Graphite on commercially lined paper

Sketchbook with beige cloth-covered cardboard covers

Graphite on off-white wove paper, mounted on cardboard

Graphite on off-white wove paper

Brown conté crayon on ivory laid paper