Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Detail of rear stair (1/2", 1 1/2, and 6" = 1'-0")

Watercolor over graphite on off-white wove paper

Watercolor over graphite on off-white wove paper

Graphite on cream wove paper

Graphite on gray wove paper

Watercolor on ruled off-white wove paper

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

Black ink, graphite, and yellow chalk on off-white wove paper; verso: black ink

Graphite, watercolor and white gouache on brown wove paper

Black ink on tan wove paper

Collage

Graphite and white gouache on blue laid paper

Black ink, graphite, yellow chalk on off-white wove paper