Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Interior elevations of swimming pool (1/4" and 1/2" = 1'-0")

Black ink on off-white wove paper

Transparent and opaque watercolor over graphite on off-white wove paper mounted on cardboard

Graphite on cream wove paper

Charcoal on off-white laid paper

Watercolor over graphite on off-white wove paper

Watercolor and white gouache on blue wove paper, mounted on buff wove card

Graphite on paper

Graphite on paper

Graphite on paper

Incised line and Aquarelle on white wove paper

Black ink on cream laid ppr, mounted to brown wove ppr, then to orange wove ppr

Brown ink on white wove paper