Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Section through pool wing (1 1/2" = 1'-0")

Graphite on off-white wove paper

Graphite and yellow crayon on paper

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

Watercolor on off-white wove paper

Graphite on off-white wove paper

Black ink on white wove paper

Crayon on paper

Graphite on off-white wove paper

Watercolor over graphite on off-white wove paper

Black ink on off-white wove paper

Graphite and white chalk on buff wove paper, laid down

Graphite on ivory laid paper