Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Typical tread in main stair: details (1 1/2" = 1'-0")

Oil on white primed paper

Black ink on tan wove paper

Black colored pencil on tan wove paper

Black ink over graphite on off-white tracing paper

Graphite on off-white wove paper

Watercolor and gouache over graphite on paper

Graphite on off-white wove paper

Watercolor on ruled off-white wove paper

Watercolor and graphite on off-white wove paper

Charcoal, oil stick, acrylic, and Liquid Paper on white wove paper

Watercolor on cream wove paper

Graphite on tracing paper