Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Detail of rear stair (1/2", 1 1/2, and 6" = 1'-0")

Graphite on thin off-white wove paper

Charcoal on buff wove paper

Brown crayon on off-white laid paper

Gouache, graphite and watercolor on off-white Japanese paper

Colored chalk on blue-buff laid paper

Black ink, watercolor (?), synthetic paint (?) and wax on cream wove paper, mounted to board

Black ink and gray wash on cream laid paper, mounted to brown wove paper

Graphite on paper

Graphite on off-white wove paper

Black ink on ivory laid paper

Graphite on cream wove paper, mounted on heavy cream wove paper

Colored pencil and graphite on brown cardboard