Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Flower box on first terrace: plan and sections (1 1/2" = 1'-0")

Watercolor on three sheets of overlapping white wove paper

Graphite on paper

Colored crayon with scratchwork on off-white illustration board

Watercolor over graphite on illustration board

Graphite and charcoal on paper

Graphite on off-white wove paper

Sketchbook with cardboard backing, heavy paper cover, and spiral wire binding

Watercolor, gouache, black ink and graphite on cream wove paper mounted on board

Black and/or brown ball point ink and black felt-tipped pen on two sheets of accordian-folded laminated Japanese paper, bound in a book

Watercolor over graphite on off-white wove paper

Black ink on off-white wove paper

Black ink on heavy off-white wove paper