Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Outside stairs at servant porch; exterior door entry: plan, sections, elevations, details (1/2" , 1 1/2" , and 6" = 1'0")

Graphite and black chalk on off-white wove paper

Black conté crayon on ivory tracing paper

Graphite on paper

Watercolor and graphite on off-white wove paper

Black ink and yellow chalk on off-white wove paper

Graphite on paper

Black ink on off-white wove paper

Graphite on translucent wove paper

Charcoal and watercolor on off-white laid paper

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

Black crayon on paper

Graphite on off-white wove paper