Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Door frames in concrete walls: sections and elevation (3/8" =1'-0" and full size)

Black ink on off-white wove paper

Graphite on off-white wove paper

Charcoal and graphite on off-white wove paper

Graphite on pale blue wove paper

Sketchbook with blue- and black-fabric-covered cardboard covers

Black ink, watercolor, and charcoal on cream wove paper

Watercolor and graphite on cream wove paper

Black ink on cream wove paper

Acrylic on off-white wove paper

Incised line and Aquarelle on white wove paper

Graphite on off-white wove paper

Charcoal, white pencil, black ink, red watercolor (or ink) on off-white wove paper