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)

Graphite with blue and orange on paper

Graphite on off-white wove paper

Graphite on off-white tissue paper

Transparent and opaque watercolor on white wove paper

Black ink on off-white wove paper

Graphite on off-white wove paper

Watercolor on off-white wove paper

Black ink on brown laid paper

Black ink on off-white wove paper

Sketchbook with cardboard backing, heavy paper cover, and spiral wire binding

Graphite on off-white wove paper

Watercolor over graphite on cream wove paper