Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Location of lights in swimming pool

Black crayon on paper

Graphite, gouache, black ink and typing on white wove paper

Graphite on paper

Charcoal on off-white laid paper

Black ink on off-white wove paper

Charcoal, oil stick, acrylic, and Liquid Paper on white wove paper

Black ink, graphite, and red and blue pencil on off-white wove paper

Black ink and graphite on off-white wove paper

Graphite on paper

Graphite on paper

Gouache on cream wove paper; verso: black crayon and pastel

Graphite on paper