Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Duct and revised coal pocket: section and details (1/2" = 1'-0")

Watercolor and black crayon on off-white wove paper

Black ink on dark blue wove paper

Black ink on white illustration board

Watercolor on off-white wove paper

Graphite on off-white wove paper

Watercolor on paper pulp and wire grid

Collage

Graphite and ink on paper

Charcoal on paper

Graphite on off-white wove paper

Black ink and watercolor pencil on cream laid paper, edges taped

Watercolor over graphite on two pieces of white wove paper