Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Acoustic ceiling plans (3" , 1/2" = 1'-0")

Black ink on off-white wove paper

Sketchbook with tan paper covers

Graphite on paper

Black ink on off-white wove paper

Black chalk on off-white laid paper

Black ink on off-white wove paper

Graphite on white wove paper

Oil on white wove paper

Graphite on buff wove paper

Black ink over graphite on off-white laid paper

Graphite on off-white wove paper

Mixed media on paper