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

Graphite on cream colored paper torn from a spiral notebook

Graphite on paper

Collage with multiple drawing media on cream wove paper

Gray wash on off-white wove paper

Black ink and charcoal on cream laid paper

Graphite on off-white wove paper

Transparent and opaque watercolor on off-white wove paper

Red conté crayon on ivory tracing paper

Black ink and white-gray gouache on grayish-white textured wove paper

Charcoal, watercolor, and white chalk on cream wove paper, edges taped

Black ink and graphite on off-white wove paper

Black crayon on paper