Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Perspective from corner of southwest terrace toward corner pavilion showing concealment of neighbor's garage

Graphite on dark cream wove paper, darkened

Watercolor, brown and blue ink, colored pencil, black chalk on off-white wove paper

Graphite on paper

Black ink on blue wove paper

Black ink and graphite on off-white wove paper

Crayon on paper

Graphite on paper

Graphite on off-white wove paper

Graphite on paper

Black chalk on off-white laid paper

Black ink, charcoal, and watercolor pencil on cream laid paper

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