Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: First floor plan

Copperpoint with fire and smoke on prepared paper

Graphite on ivory laid paper

Black ink on off-white wove paper

Graphite on paper

Graphite on paper

Graphite on paper

Watercolor over graphite on off-white wove paper

Graphite on dark cream wove paper

Watercolor and graphite on white wove paper

Paper dots numbered in black ink and mounted on blue/white graph wove paper

Black ink with extensive scratchwork and graphite on white scratchboard

Graphite on off-white wove paper