Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Radiator schedule and piping diagram: isometric

Black crayon on paper

Black ink on white wove paper

Graphite and watercolor on cream laid paper

Graphite on off-white wove paper

Graphite on off-white antique laid paper

Watercolor and graphite on cream wove paper; verso: black ink and graphite

Charcoal on blue laid paper

Graphite on paper

Black ink on cream wove paper

Ink, marker, colored pencil and graphite on Strathmore folded in half

Black ink on off-white wove paper

Red watercolor on white wove paper