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

Watercolor over graphite on off-white wove paper

Charcoal on blue wove paper

Watercolor over graphite on thin off-white wove paper

Watercolor over graphite on off-white wove paper

Red chalk and black crayon over graphite on off-white wove paper

Black ink and gouache on off-white wove paper

Leadpoint and white chalk on off-white modern wove paper, prepared with lead white, bone ash, bone black, and rabbit skin glue

Acrylic, graphite, and computer print-out on off-white wove paper (12 drawings)

Gouache and mixed media on paper

Charcoal on tracing paper

Unfixed pastel on paper

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