Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Plumbing diagrams (1/8" = 1'-0")

Graphite on paper

Ink on paper

Watercolor on off-white wove paper

Graphite on paper

Watercolor over graphite on off-white wove paper

Graphite and acrylic on white wove paper

Graphite on off-white wove paper

Charcoal on buff wove paper

Black ink, charcoal, watercolor, and watercolor pencil on beige laid paper, edges taped

Black ink on tan wove paper

Black ink on off-white wove paper (recto and verso)

Watercolor and graphite on thin cream wove paper