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

Graphite on paper

Gouache on cream wove paper

Charcoal and white chalk on buff wove paper

Graphite on paper

Black ink on cream wove paper

Oil on very thin, fibrous paper, set down on heavier paper

Graphite on off-white wove paper

Graphite on off-white wove paper

Pastel on blue wove paper

Graphite on buff wove paper

Watercolor on off-white wove paper

Black ink and charcoal on cream laid paper