Keystone of an Arch, Frontal View and Profile; verso: Sketches of a Ground Plan and a Nude Male Figure

Black ink on off-white wove paper

Brown ink on cream antique laid paper

Graphite on off-white wove paper

Graphite on off-white wove paper

Black, yellow and blue crayon on paper

Watercolor over graphite on white wove paper

Ink on paper

Graphite on paper

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

Graphite and gray wash on gesso prepared off-white wove paper, attached to two other sheets of off-white wove paper, cut and incised

Brown ink and brown and blue wash on off-white antique laid paper

Graphite on buff wove paper