Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Details of garden retaining walls: plan and section (1/2" = 1'-0")

Black ink on tan wove paper

Black crayon on off-white wove paper

Black ink on cream wove paper, framing line in graphite

Sketchbook with brown cloth-covered cardboard covers

Ink on paper

Graphite on paper

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

Graphite on off-white wove paper

Graphite on off-white wove paper

Graphite on white laid paper

Graphite on cream wove paper

Gouache and black crayon (?) on cream wove paper