Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Main stairs: plans, elevation and sections (1/2" , 3" =1"-0" )

Oil on white primed paper

Graphite on paper

Graphite on paper

Colored inks over graphite on off-white wove paper

Sketchbook with cardboard covers and maroon cloth spine

Graphite on off-white wove paper; verso: charcoal

Graphite on off-white wove paper

Graphite on paper

Oil, powdered pigment, black crayon, and collage on heavy card

Charcoal on blue laid paper

Graphite on off-white wove paper

Black ink over graphite on cream laid paper