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

Graphite on paper

Watercolor over graphite on off-white illustration board

Graphite and ink on paper, two pages hinged

Graphite on paper

Graphite on paper

Dyes, opaque water-based paint, pastel and metallic powder on thick white wove paper

Watercolor on paper

Graphite on paper

Graphite and charcoal on off-white wove paper

Black fiber-tip ink on off-white wove paper

Graphite on paper

Graphite on off-white wove paper