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

Oil on heavy cream wove paper

Colored crayon on brown paper

Graphite on paper

Graphite on paper

Watercolor on heavy off-white wove paper

Oil on white prepared paper

Charcoal and white chalk on gray-brown wove paper

Casein and black and blue crayon on off-white card

Graphite on paper

Watercolor on off-white wove paper

Charcoal on off-white laid paper; verso: graphite

Black ink over graphite on off-white wove paper