Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Lights - roof terrace, third floor: elevation and detail (1/4" and 3" = 1'-0")

Watercolor and graphite on off-white wove paper mounted to card

Graphite on prepared board

Watercolor and white gouache over graphite on buff laid paper; verso: graphite

Colored crayons on paper

Dark brown ink on white wove paper

Graphite on off-white wove paper

Graphite and white gouache with scratchwork on blue/brown prepared paper

Graphite on off-white wove paper

Watercolor over graphite on off-white wove paper

Black ink, charcoal, and watercolor pencil on cream laid paper

Charcoal on blue laid paper

Graphite on cream wove paper