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)

Black ink and graphite on thin buff wove paper

Black ink and gray wash over graphite on off-white wove paper

Black ink, graphite, and yellow ink on off-white wove paper

Black ink and blue pencil on cream wove paper

Graphite and incised lines on white wove paper

Graphite on off-white wove paper

Graphite on brown wove paper

Graphite on off-white wove paper

Graphite on off-white wove paper

Graphite on off-white wove paper

Watercolor and graphite on off-white wove paper

Graphite on off-white wove paper