Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Revision of retaining wall (garage): plan and details (1/8" = 1'-0")

Graphite on off-white wove paper

Watercolor, black ink, fiber-tip ink, synthetic paint, wax and pastel (?) on white paperboard

Black ink on off-white wove paper

Watercolor over graphite on heavy off-white wove paper

Graphite on off-white wove paper

Black crayon on thin buff wove paper

Watercolor on off-white wove paper; verso: graphite

Sketchbook with cardboard backing, heavy paper cover, and spiral wire binding

Watercolor and gouache on off-white wove paper

Graphite on off-white wove paper

Black crayon and graphite on thin off-white wove paper

Crayon on paper