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

Watercolor over graphite on off-white wove paper

Charcoal on off-white laid paper

Black crayon and graphite on thin darkened off-white wove paper

Black ink on white wove paper

Graphite and red and white pastel on blue laid paper

Graphite on paper

Graphite and charcoal on off-white wove paper

Tempera on purple construction paper

Graphite on tracing paper

Black ink and black and brown chalk on buff laid paper

Sketchbook with cardboard backing, heavy paper cover, and spiral wire binding

Black ink on heavy off-white wove paper