Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Study joist layout: plan (1/2" = 1'-0")

Colored crayons on paper

Graphite on paper

Graphite on off-white wove paper

Charcoal and graphite on illustration board

Graphite, pastel and gunpowder on white paper

Black chalk and charcoal on off-white laid paper

Graphite on cream wove paper

Graphite sketches on paper

Brown, black, and colored ink and wash over graphite on heavy buff wove paper

Graphite, red and blue ink on yellow lined wove notebook paper

Black ink and colored and black chalk on off-white wove paper

Graphite on paper