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

Watercolor on off-white wove paper

Black ink and wash, red, blue, and yellow watercolor on cream wove paper

Graphite on heavy cream wove paper

Graphite on paper

Graphite on paper

Graphite on paper

Black, white and brown chalk on blue paper

Graphite wash & graphite on off-wh. wove ppr; verso: watercolor, gr. & gr. wash

Graphite on buff wove paper, mounted on off-white wove paper

Graphite on off-white wove paper

Graphite on green card

Black ink on cream wove paper