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

Watercolor over graphite on off-white wove paper

Black crayon on paper

Charcoal on blue laid paper

Colored markers on graph paper

Graphite on paper

Graphite on off-white wove paper

Watercolor over graphite on off-white wove paper, mounted to off-white card

Collage

Black in on tan, machine made, wove paper

Black ink on off-white wove paper

Black ink on off-white wove paper

Watercolor on cream wove paper