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

Charcoal on blue laid paper

Pastel on off-white wove paper

Pastel on buff wove paper

Multiple drawing media, including graphite, pastel, chalk, felt-tip marker, metallic crayon (?), ball point ink, colored pencil, colored crayon; collage including tracing paper, yellow lined paper, graph paper, paper with white ground, tan paper, linen tape

Graphite on off-white wove paper

Crayon, opaque watercolor and graphite on white thick rough wove paper

Crayon on discolored cream wove paper

Black ink and graphite on off-white wove paper

Graphite on darkened off-white wove paper

Graphite on off-white wove paper

Watercolor and white gouache on off-white wove paper

Graphite on off-white wove paper