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 on off-white wove paper

Graphite on off-white tracing paper

Verso: graphite on off-white laid paper

Transparent and opaque watercolor and graphite on beige wove paper mounted to board

Graphite on off-white wove paper

Charcoal on gray-blue laid paper

Watercolor over graphite on off-white wove paper

Black chalk on off-white wove paper

Crayon on paper

Graphite on paper

Brown ink on white wove paper

Graphite on off-white wove tracing paper