Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Third floor, outlets #25-27: plan and section (1/4" and 3" = 1'-0" )

Sketchbook with cardboard covers and spiral wire binding

Graphite on off-white laid paper

Silverpoint on off-white wove paper prepared with Chinese white

Graphite on graph paper

Black crayon and ink on paper

Graphite on off-white laid paper

Watercolor and graphite on cream wove paper

Graphite on paper

Charcoal and white and red chalk on cream laid paper

Graphite on paper

Charcoal on white rough-finished Bristol board

Graphite on paper