Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Exterior stone through main entrance; part of northwest elevation (1/2" and 1/4" = 1'0")

Graphite on off-white wove paper

Paper

Graphite on off-white wove paper

Sketchbook with beige-fabric-covered cardboard covers

Watercolor and black chalk (?) on cardboard

Black crayon and white gouache on blue laid paper

Black crayon on paper

Colored crayons on paper

Charcoal on blue laid paper

Watercolor over graphite on off-white wove paper

Graphite on paper

Charcoal on off-white laid paper