Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Connector enclosures, second and third floors: details (1/2" = 1'0")

Watercolor over graphite on off-white wove paper mounted to off-white cardboard

Watercolor on cream wove paper

Graphite on paper

Watercolor over graphite on off-white wove paper

Watercolor and graphite on cream wove paper

Watercolor on off-white wove paper

Graphite and wax crayon on glossy wove paper

Graphite on off-white wove paper

Watercolor over graphite on off-white wove paper

Blue-black ink on ivory wove paper

Graphite and ink on paper

Ink and gouache on paper