Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Plumbing diagrams (1/8" = 1'-0")

Graphite on off-white wove paper

Watercolor and white gouache over graphite on buff card

Black ink on off-white wove paper

Watercolor on ruled off-white wove paper

Graphite on off-white wove paper

Blue ink over photocopy

Black ink, black crayon and white gouache on off-white laid paper

Charcoal on beige laid paper

Watercolor and graphite on off-white wove paper

Graphite on buff wove paper

Red, black and brown conté crayon on ivory tracing paper

Graphite on off-white wove paper