Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Plumbing diagrams (1/8" = 1'-0")

Graphite on off-white wove paper

Graphite on paper

Pastel on paper

Black ink and charcoal on cream laid paper

Black ink on off-white wove paper; verso: black ink and gray wash

Black ink over graphite on off-white wove paper

Watercolor over graphite on off-white wove paper

Off-white card

Black ink and charcoal on cream laid paper

Charcoal on blue laid paper

Graphite on off-white wove paper

Watercolor and graphite on off-white wove paper