Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Radiator recess at curved stair wall: plan, sections, and detail (3/4" and 6" = 1'-0")

Black ink on off-white wove paper (recto and verso)

Conté crayon on white wove paper

Gouache and mixed media on paper

Watercolor and graphite on off-white wove paper

Watercolor and black ink on cream wove paper

Graphite on off-white wove paper

Black ink on off-white wove paper (recto and verso)

Watercolor over graphite on off-white illustration board

Red chalk on illustration board

Charcoal on off-white laid paper

Colored crayons on paper

Black ink on off-white wove paper