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

Black ink on tan wove paper

Watercolor on white wove paper

Graphite on paper

Black ink on off-white wove paper

Graphite on paper

Black ink on off-white wove paper

Crayon on paper

Watercolor and white gouache on cream wove paper

Pastel on blue wove paper

Black ink over graphite on off-white laid paper

Collage on paper

Black ink, graphite, and yellow chalk on off-white wove paper; verso: black ink