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

Charcoal on blue laid paper

Crayon on paper

Black ink and charcoal on cream laid paper, edges taped

Charcoal on cream laid paper

Graphite on paper

Pastel on off-white wove paper

Black ink on cream wove paper

Graphite on off-white wove paper

Graphite on paper

Watercolor on off-white wove paper

Tempera? on textured gold paper

Enamel on white wove paper