Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Exterior flood lights (1 1/2" = 1'-0" and full size)

Charcoal on yellow wove paper

Graphite on off-white wove paper

Graphite on paper

Watercolor and Chinese ink on white wove paper

Watercolor over black chalk on off-white wove paper

Graphite on off-white tracing paper

Watercolor and gouache over graphite on orange wove paper

Graphite on off-white wove paper; verso: charcoal

Black conté crayon on cream wove paper

Crayon on paper

Black ink and colored chalk on off-white wove paper; verso: black ink