Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Electrical plan - ground floor (1/4" =1'-0")

Black ink, gray/white washes, white heightening, graphite

Black crayon and graphite on off-white wove paper

Graphite on buff wove paper

Black crayon on off-white wove paper

Acrylic, graphite, and computer print-out on off-white wove paper

Black ink on tan wove paper

Brown wash over graphite on off-white wove paper

Watercolor and graphite on layered off-white wove paper

Colored chalk and beige gouache on buff wove paper

Graphite on off-white wove paper

Watercolor and graphite on white wove paper

Black ink, graphite, colored chalk on off-white wove paper; verso: black ink