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)

Charcoal on off-white laid paper

Incised line and Aquarelle on white wove paper

Watercolor and gouache on off-white wove paper

Sketchbook with cardboard covers and maroon cloth spine

Silverpoint on pink prepared paper

Graphite on off-white wove paper

Pastel on cream wove paper

Graphite on paper

Watercolor over graphite on off-white wove paper

Graphite on off-white laid paper

Graphite on cream wove paper

Graphite on off-white wove paper