Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Long section through skylight over pool (1/2" and 3" = 1'-0")

Graphite on off-white wove paper mounted on buff paper

Graphite, black ink and gray wash on heavy off-white wove paper

Incised line and Aquarelle on white wove paper

Charcoal on cream modern laid paper

Graphite on paper

Black marker, watercolor, and graphite on cream wove translucent paper

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

Black ink on brown laid paper

Graphite and black ink with scratchwork on off-white wove paper

Mixed media on paper

Graphite on paper

Off-white card