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

Black ink on off-white wove paper

Watercolor and white gouache over graphite on off-white wove paper

Graphite and white gouache on blue laid paper

Graphite on off-white wove paper

Watercolor over graphite on off-white wove paper

Metalpoint on white prepared paper

Graphite on paper

Black ink and graphite on heavy off-white wove paper

Graphite on off-white wove paper

Charcoal on off-white laid paper

Pastel and black chalk on layered off-white wove paper

Black ink on off-white wove paper