Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Northeast elevation (1/4" = 1'-0")

Charcoal on off-white laid paper

Graphite on off-white wove paper

Watercolor over graphite? on off-white wove paper

Charcoal on blue-beige laid paper

Watercolor and white gouache over graphite on thin off-white wove paper

Black ink on off-white wove paper

Graphite on paper

Graphite on off-white wove paper

Graphite on paper

Graphite on cream wove paper

Charcoal on off-white wove paper

Oil on green prepared paper