Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Duct and revised coal pocket: section and details (1/2" = 1'-0")

Black ink on off-white handmade rag laid paper

Watercolor, wax, crayon, and black ink on beige laid paper

Black ink, charcoal, watercolor, and watercolor pencil on cream laid paper, edges taped

Graphite on paper

Black ink on light tan wove paper

Graphite on paper

Graphite and brown wash on buff laid paper

Oil on off-white wove paper

Pastel on white wove paper

Graphite on paper

Graphite on off-white wove paper

Graphite with extensive erasure, rubbing and scratchwork on off-white wove paper