Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Details of model base and location model (1/2" , 1 1/2 , 3" = 1'-0" and full size )

Ink, colored crayon, gouache, and graphite traces on off-white laid paper

Watercolor over graphite on off-white wove paper, mounted to off-white card

Watercolor on off-white wove paper

Black ink, graphite, and yellow ink on off-white wove paper

Blue felt-tip marker on thin off-white wove paper (recto and verso)

Graphite and colored pencil on paper

Charcoal and black ink on off-white wove paper; verso: charcoal

Graphite on off-white wove paper

Charcoal, oil stick, acrylic, and Liquid Paper on white wove paper

Watercolor and felt-tip pen on white notebook paper with perforated edge

Charcoal, white pencil, black ink, red watercolor (or ink) on off-white wove paper

Graphite on off-white wove paper