Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Study joist layout: plan (1/2" = 1'-0")

Watercolor over graphite on cream card

Graphite on paper

Black ink, gray wash, and graphite on off-white laid paper

Graphite on paper

Graphite on paper

Opaque and transparent watercolor on white wove paper

Watercolor on off-white wove paper

Graphite on lightweight tan wove paper

Leather bound sketchbook

Black chalk and charcoal on off-white laid paper

Graphite on off-white wove paper

Gray tempera, black ink, graphite, and scratchwork on off-white wove paper; verso: black ink and graphite