Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Stairs at swimming pool: plans, elevations, sections (3/4" =1"-0" )

Graphite on off-white wove paper

Black crayon and ink on paper

Crayon on paper and mounted

Charcoal on off-white laid paper

Black ink and charcoal on off-white wove paper; verso: black ink

Graphite on heavy cream wove paper

Black ink on off-white wove paper

Graphite and colored pencil on artist's vellum (tracing paper)

Black ink on off-white tracing paper

Oil and watercolor on thin off-white wove paper

Ink and graphite on paper

Charcoal on off-white laid paper