Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Electric cabinet and recess in 220: elevations and sections (6" = 1'-0" and full size)

Black ink on off-white wove paper mounted on card

Graphite on buff wove paper

Mixed media on paper

Watercolor and felt-tip pen on white notebook paper with perforated edge

Graphite on paper

Graphite on paper

Graphite and charcoal on off-white wove paper; verso: graphite

Graphite on off-white wove paper

Charcoal on off-white laid paper

Watercolor over graphite on off-white wove paper

Graphite on off-white wove paper

Watercolor on paper