Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Lights - roof terrace, third floor: elevation and detail (1/4" and 3" = 1'-0")

Collage on paper

Watercolor and white gouache over graphite on off-white wove paper

Colored pencil and graphite on gray cardboard

Black felt-tipped pen on yellowed newsprint paper

Graphite on paper

Watercolor on off-white wove paper

Black chalk on off-white wove paper

Black ink on tan wove paper

Black ink on off-white wove paper

Black ink, charcoal, and watercolor pencil on cream wove paper

Graphite on paper

Graphite and ink on paper