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

Black ink, charcoal, and watercolor pencil on cream laid paper

Graphite on off-white wove paper

Graphite on translucent vellum paper, blue ballpoint ink on the verso

Charcoal on off-white laid paper

Brown crayon on off-white laid paper

Watercolor over graphite on heavy off-white wove paper

Watercolor over graphite on off-white wove paper

Black ink on off-white wove paper

Black ink on off-white wove paper

Graphite on paper

Graphite on off-white wove paper

Watercolor and white gouache on cream wove paper