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

Transparent and opaque watercolor on white paper mounted to board

Graphite on off-white wove paper

Graphite on off-white wove paper

Graphite on brown wove paper

Black ink on off-white wove paper

Watercolor and graphite on layered cream wove paper

Black, purple and brown crayon on paper

Black ink on blue laid paper

Pastel on off-white illustration board

Transparent and opaque watercolor and charcoal on gray wove paper

Watercolor, graphite and ink on off-white wove paper

Black ink on tan wove paper