Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Workshop wall and sill: details (full size)

Black ink over graphite on off-white laid paper

Charcoal on tracing paper

Charcoal on blue laid paper

Gouache and graphite on white Fome-Cor

Graphite on paper

Watercolor on off-white wove paper

Transparent and opaque watercolor and graphite on heavy off-white wove paper

Watercolor on off-white wove paper

Black ink and graphite on off-white wove paper

Graphite on paper

Sketchbook with cardboard covers and spiral wire binding

Watercolor and white crayon on off-white wove paper, mounted to cardboard