Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Third floor, outlets #25-27: plan and section (1/4" and 3" = 1'-0" )

Graphite on darkened off-white wove paper

Graphite on paper

Graphite and white chalk on gray wove paper

Ink and brown pencil on white wove paper

Crayon on paper

Graphite on paper

Sketchbook with beige cloth-covered cardboard covers

Black ink and black watercolor on tan wove paper

Black ink on folded cream colored paper

Graphite on off white wove paper

Watercolor and graphite on white wove paper