Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Electric cabinet and recess in 220: elevations and sections (6" = 1'-0" and full size)

Watercolor on off-white wove paper

Watercolor over graphite on off-white wove paper

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

Black felt-tipped pen on off-white wove paper

Graphite and ink on paper

Watercolor and white gouache over graphite on off-white illustration board

Graphite on off-white wove paper

Sketchbook with cardboard covers and spiral wire binding

Graphite on off-white wove paper

Charcoal, graphite wash and graphite with polyester resin moulded hand, string, paintbrush and wooden ruler on off-white wove paper

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