Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Revised duct location: plan for 208 (1/4" = 1'-0")

Black and white chalk on darkened buff laid paper

Black ink on off-white wove paper

Pink and black ink, gray wash, and white gouache on off-white wove paper

Black ink on cream wove paper (recto and verso)

Black ink with corrections in white on off-white illustration board

Graphite on off-white laid paper

Graphite, white gouache and gray wash on buff wove paper

Watercolor pencil and graphite on off-white wove paper

Watercolor over graphite on buff wove paper

Graphite on cream wove paper

Graphite on off-white wove paper

Transparent watercolor and black ink with graphite framing line on paper