Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Connectors enclosure detail (full size)

Colored pencil on brown wove paper

Graphite on thin off-white wove paper

Watercolor and graphite on cream wove paper

Graphite and blue crayon on paper

Graphite on buff wove paper

Black ink and graphite on off-white wove graph paper

Black ink on off-white wove paper (recto and verso)

Graphite on paper

Graphite on paper

Graphite on cream wove paper

Leather bound sketchbook

Graphite on paper