Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Radiator recess at curved stair wall: plan, sections, and detail (3/4" and 6" = 1'-0")

Graphite on paper

Transparent and opaque watercolor and charcoal on heavy white wove paper

Graphite on paper

Graphite on paper

Carbon ink from carbon paper, typed, on cream wove paper

Graphite on cream wove paper, laid down to buff wove ppr & mounted to white card

Graphite on off-white wove paper

Pastel on paper

Black ink on off-white wove paper; verso: black ink and gray wash

Gray wash with graphite on off-white wove paper

Graphite on cream tracing paper

Gray-black ink on off-white wove paper, mounted on board