Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Perspective from corner of southwest terrace toward corner pavilion showing concealment of neighbor's garage

Watercolor over graphite on heavy white paper

Watercolor and white gouache on off-white wove paper

Black ink, gray wash and white gouache on off-white wove paper, mounted on buff wove paper

Charcoal and black ink on cream laid paper

Black ball-point ink on cream wove paper; verso: same

Watercolor on off-white wove paper

Graphite on off-white wove paper

Graphite on off-white wove paper

Graphite on paper

Watercolor on cream wove paper

Crayon on paper

Watercolor over graphite on off-white illustration board