Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Pergola - Upper garden: plan and elevations (1/2" = 1'-0")

Watercolor over graphite on cream wove paper

Graphite on off-white wove paper

Charcoal on tracing paper

Black ink, watercolor, gold paint, white gouache on heavy off-white wove paper

Graphite and charcoal on off-white wove paper

Black and brown ink, black chalk and gray wash on off-white notebook paper

Graphite on off-white wove paper

Graphite and ink on transparent paper

Graphite on buff wove paper

Watercolor over graphite on off-white wove paper

Black ink on off-white wove paper

Watercolor on heavy off-white wove paper