Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Section through pool wing (1 1/2" = 1'-0")

Purple and black ink on off-white wove paper

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

Black ink, watercolor, and charcoal on cream wove paper

Watercolor over graphite on off-white illustration board

Graphite on buff wove paper

Graphite on paper

Watercolor, black ink, gray wash, metallic paint over graphite on buff wove ppr

Charcoal on cream laid paper

Graphite on paper

Graphite on off-white wove paper

Black and blue ink on off-white wove paper

Graphite on off-white wove paper