Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Curved stair window and adjoining door: plan and details (1/2" , 1 1/2, 3", 6"= 1'-0" and full size)

Carbon ink from carbon paper, typed, on cream wove paper

Oil and crayon on wove paper

Sketchbook with black fabric-covered cardboard covers, held by two metal rings

Graphite on darkened off-white wove paper

Graphite on off-white wove paper

Black ink on off-white wove paper

Graphite on off-white wove paper

Collage of cut colored paper on paper prepared with opaque watercolor on orange wove paper

Transparent and opaque watercolor and black crayon on off-white wove paper

Watercolor over graphite on off-white wove paper

Graphite and beeswax on wove paper

Black crayon on thin brown wove paper