Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Water heating system: plan and elevation

Watercolor over graphite on off-white wove paper

Colored crayons on paper

Black ink on cream wove paper

Crayon, opaque watercolor and graphite on white thick rough wove paper

Graphite on off-white wove paper

Charcoal on cream laid paper

Black ink on two joined sheets of green prepared paper

Graphite on paper

Watercolor on beige Asian paper mounted to white paper mounted to canvas

Watercolor on darkened cream wove paper

Watercolor and graphite on cream wove paper

Black ink on cream wove paper