Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Wall sections (1 1/2" = 1'-0")

Spiral-bound sketchbook with cardboard covers; twenty pages of off-white wove paper

Black ink on off-white wove paper

Black ink and gouache on cream wove paper

Charcoal on paper

Graphite on off-white wove paper

Watercolor over graphite on off-white wove paper

Black ink on cream wove paper

Charcoal on blue laid paper

Turpentine wash with oil on off-white wove rag paper

Black crayon and ink on paper

Graphite on paper

Charcoal on off-white laid paper