Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Bracket, wire way, swivel: section and perspective

Watercolor over graphite on heavy cream wove paper (recto and verso)

Black and blue crayon ; black and green crayon on paper

Graphite on off-white wove paper

Black ink on off-white tracing paper

Watercolor on cream wove paper

Black ink on off-white wove paper

Pastel and graphite on off-white wove paper

Graphite on off-white wove paper

Graphite on cream wove paper

Watercolor over graphite on white wove watercolor paper

Black crayon on gray wove paper

Graphite and black ink on cream wove paper