Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Telephone niche in swimming pool: plan, elevation and section (1/2" and 3" = 1'-0")

Black ink over graphite on thin tracing paper mounted to off-white cardboard

Graphite on paper

Graphite on paper

Black ink, blue crayon, white-out and touches of red ink on pink squared wove paper

Black ink and charcoal on cream wove paper

Watercolor and white gouache on cream wove paper

Charcoal on white rough-finished Bristol board

Charcoal, white pencil, red watercolor (or ink) on off-white wove paper

White gouache, black ink, colored pencil, and graphite on green prepared wove paper

Black ink on off-white wove paper mounted to card

Watercolor and white gouache on off-white wove paper

Watercolor over graphite on off-white wove paper