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

Black ink and gouache on heavy off-white wove paper

Graphite on cream wove paper

Watercolor and black ink on tan wove paper

Watercolor on off-white wove paper

Sketchbook with cardboard backing, heavy paper cover, and spiral wire binding

Watercolor and graphite on off-white wove paper

Charcoal on blue laid paper

Ink and gouache on paper

Black, brown and purple crayon on paper

Black crayon on off-white wove paper

Graphite on tan wove paper; verso: graphite on tan wove paper

Oil, watercolor and graphite on thin off-white wove paper