Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Details of main stair (1/2" , 3" = 1'-0" and full size)

Black chalk on off-white wove paper

Black crayon on off-white wove paper

Black ink on tan wove paper

Oil and colored ink on off-white wove paper

Watercolor on ruled off-white wove paper

Graphite on heavy buff wove paper, fixed

Black ink on illustration board

Watercolor on off-white wove paper

Pastel on blue wove paper

Red conte crayon on cream wove paper

Black marker on graph paper

Watercolor over graphite on off-white illustration board