Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Duct and revised coal pocket: section and details (1/2" = 1'-0")

Graphite on off-white wove paper

Watercolor and gouache over graphite on cream wove paper

Graphite on paper

Graphite on tan wove paper (recto and verso)

Graphite on off-white card

Tempera on purple construction paper

Copperpoint, fire, smoke, wax, on prepared paper

Graphite on buff tracing paper mounted to off-white wove paper

Black ink on dark blue wove paper

Gouache over graphite on off-white wove paper

Graphite on buff wove paper

Graphite and ink on paper