Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Numerals - light signals (full size)

Brown-black fiber-tip ink over graphite on cream wove paper

Mixed media on paper

Watercolor and graphite on white wove paper

Graphite and black chalk on buff laid paper

Black ink and colored chalk on translucent buff wove paper

Graphite on paper

Charcoal on blue laid paper

Graphite, graphite wash , and staples on layered translucent vellum paper

Watercolor, black ink, and wax on white wove paper

Graphite and wax crayon on white wove translucent paper

Watercolor and felt-tip pen on white notebook paper with perforated edge

Crayon on paper