Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Interior elevations of swimming pool (1/4" and 1/2" = 1'-0")

Crayon on paper

Graphite on tan wove paper

Watercolor on ruled off-white wove paper

Graphite on paper

Graphite on paper

Black and white chalk on brown wove paper

Watercolor over graphite on off-white wove paper

Charcoal on off-white wove paper

Graphite on paper

Graphite on paper

Black ink on off-white wove paper

Graphite on cream wove paper