Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Details of garden retaining walls: plan and section (1/2" = 1'-0")

Black ink and oil on thin off-white wove paper, mounted on ivory wove paper

Graphite on off-white wove paper

Colored pencil on gray-green laid paper

Graphite on off-white wove paper

Watercolor over graphite on off-white wove paper, mounted to off-white cardboard

Graphite and ink on paper

Charcoal and graphite on white wove paper

Graphite on paper

Graphite and transparent watercolor on white wove paper

Watercolor on ruled off-white wove paper

Crayon on paper

Graphite on cream wove paper