Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Study and bedroom chimney details (1/4" = 1'0")

Transparent and opaque watercolor on off-white wove paper

Watercolor over graphite on off-white wove paper

Crayon on paper

Black ink, graphite, and yellow chalk on off-white wove paper

Graphite on paper

Graphite on cream wove paper

Black crayon and ink on paper

Watercolor on off-white wove paper

Black ink and charcoal on cream laid paper

Paintstick on double-laminated Hiromi paper

Graphite on off-white wove paper

Black conté crayon on ivory tracing paper