Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Method of securing structural glass at head of bathroom windows: details (full size)

Black ink over graphite on off-white laid paper

Black ink and graphite on white wove paper, cut and mounted to board, with colored pencil and graphite

Graphite on gray wove paper

Graphite on white wove paper

Black crayon on thin brown wove paper

Graphite on off-white wove paper

Purple and black ink on off-white wove paper

Watercolor and graphite on cream wove paper; verso: black ink and graphite

Watercolor over graphite on off-white wove paper

Black chalk on off-white laid paper

Watercolor and graphite on off-white wove paper

Watercolor over graphite on illustration board, waxed