Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Receivador in rear door #101: elevation, section, and detail (1" =1'-0")

Charcoal on brown wove paper

Transparent and opaque watercolor over graphite on off-white wove paper

Leadpoint and white chalk on off-white modern wove paper, prepared with lead white, bone ash, bone black, and rabbit skin glue

Graphite on paper

Sketchbook with beige cloth covers and Fabriano paper pages

Graphite on cream wove paper

Black and gray wash and graphite on tan wove paper; verso: gray wash

Graphite on off-white wove paper

Oil and watercolor on thin off-white wove paper

Watercolor over graphite on heavy off-white wove paper

Graphite on off-white card

Graphite on heavy blue wove paper