Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Door frames in concrete walls: sections and elevation (3/8" =1'-0" and full size)

Graphite on translucent vellum paper, the reverse printed with a grid

Colored crayons on paper mounted

Black ink with blue, red, and black ground pigments on off-white antique laid paper

Charcoal on cream laid paper

Transparent and opaque watercolor on cream, thick, rough, wove paper

Black ink on off-white wove paper

Graphite on off-white wove paper

Graphite on cream wove paper

Beeswax, graphite, detritus and debris on wove paper

Watercolor over black chalk on off-white illustration board

Black tempera on darkened off-white wove paper

Watercolor, black ink, and metallic paint over graphite on off-white wove paper; graphite and gray wash