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

Charcoal on blue laid paper

Black ink and white gouache over graphite on off-white wove paper

Black ink and gray wash on cream laid paper

Black crayon and gray wash with graphite on cream wove paper

Graphite on buff wove paper

Black crayon on off-white wove paper

Graphite and black watercolor on tan wove paper

Ink on paper

Graphite on cream wove paper

Black chalk over a blue ink grid on cream wove paper

Black and white chalk on blue-gray wove paper

Watercolor and graphite on white wove paper