Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Third floor and roof plans (1/4" = 1'-0")

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

Black ink and graphite on heavy off-white wove paper

Graphite on coated off-white wove paper

Graphite and white gouache on buff wove paper

Graphite on off-white laid paper

India ink over graphite on white wove paper

Black ink on off-white wove paper

Black ink on off-white wove paper

Graphite and black watercolor on tan wove paper

Watercolor and white gouache over graphite on buff laid paper

Transparent watercolor and black ink on cream wove paper

Black ink on off-white wove paper