Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Location of underwater pool lighting: diagram and detail (1/4" = 1'0")

Watercolor and graphite on layered off-white wove paper

Graphite on off-white wove paper

Beeswax, graphite, detritus and debris on wove paper

Watercolor over graphite on heavy off-white wove paper

Graphite on translucent vellum paper

Charcoal and watercolor on off-white laid paper

Watercolor on off-white wove paper

Black ink on off-white wove paper

Graphite on darkened off-white wove paper

Black, blue and brown crayon on paper

Black ink on gray-blue laid paper

Graphite on darkened off-white wove paper