Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Lighting detail at window head (full size)

Colored crayons on paper

Watercolor on off-white wove paper

Crayon on paper

Sketchbook with black-leather-covered cardboard covers

Graphite, blue ink and black type on commercially printed cream wove paper

Gouache on cream wove paper

Green watercolor and black ink on off-white wove paper

Graphite on paper

Colored ink on off-white wove paper, mounted to muslin

Charcoal, oil stick, acrylic, and Liquid Paper on white wove paper

Black ink over graphite on thin tracing paper mounted to off-white cardboard

Charcoal on blue laid paper