Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Typical tread in main stair: details (1 1/2" = 1'-0")

Black ink over graphite on brown wove paper mounted to heavy brown cardboard

Sepia ink and acrylic varnish on off-white wove paper mounted on aluminum

Crayon over graphite on off-white wove paper

Watercolor and white gouache on cream wove paper

Black and red chalk on off-white wove paper

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

Black ink over graphite on modern laid paper

Graphite

Colored markers on graph paper

Various media, including graphite, colored crayon, watercolor, felt-tipped pen on cream laid paper

Graphite on off-white wove paper

Graphite on off-white wove paper