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

Black crayon on thin ivory wove paper

Crayon on paper

Ink on paper

Graphite and charcoal on off-white wove paper

Watercolor and gouache over graphite on buff laid paper

Black felt-tipped pen on yellowed newsprint paper

Graphite on off-white wove paper

Graphite on paper

Charcoal on buff wove paper

Watercolor and graphite on white wove paper

Black ink and gray wash on off-white wove paper