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

Graphite on off-white laid paper

Graphite on paper

Crayon on paper

Black, brown and blue crayon on paper

Off-set pastel and watercolor on white wove paper

Gouache and graphite on white Fome-Cor

Graphite on paper

Pastel on brown wove paper-faced illustration board

Graphite on off-white wove paper

Watercolor and black wash over graphite on off-white wove paper

Graphite and black ink on ivory laid paper

Watercolor over graphite on illustration board