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

Black crayon on off-white wove paper

Watercolor on white wove paper

Graphite on off-white wove paper

Red ink, green fiber-tipped ink and watercolor on off-white wove paper

Graphite on off-white wove paper

Charcoal on cream laid paper

Mixed media on paper

Graphite on off-white wove paper

Graphite on heavy cream wove paper

Charcoal on off-white laid paper

Graphite on paper

Graphite on paper