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

Black ink and charcoal on cream modern laid paper

Graphite on paper

Black crayon on paper

Black ink on off-white wove paper

Sketchbook with cardboard covers and spiral wire binding

Watercolor and white gouache over graphite on cream wove paper

Opaque and transparent watercolor on white wove paper

Graphite on paper

Graphite on cream wove paper

Watercolor over graphite on heavy off-white wove paper

Graphite, white gouache and pink watercolor on off-white wove paper

Watercolor and black wash over graphite on off-white wove paper