Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Casework revisions - rooms #220 and #216: plan, section, and elevation (1/2", 3/4", 1 1/2" and 6" = 1'-0")

Crayon on paper

Black ink on thin off-white wove paper

Watercolor over graphite on off-white wove paper

Oil on tracing paper

Watercolor, graphite wash and black crayon on off-white wove paper

Graphite and blue crayon on off-white wove paper

Graphite on off-white wove paper

Graphite on paper

Black crayon on paper

Graphite on off-white wove paper

Black ink on white wove paper with perforations

Watercolor over graphite on off-white laid paper?