Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Pipe railing details (1/4" , 1/2" = 1'-0" and full size)

Ink, colored crayon, watercolor, and graphite traces on off-white laid paper

Black ink on slide film, hand colored

Black ink on tan wove paper

Charcoal and graphite on off-white wove paper

Graphite on off-white wove paper

Graphite on buff wove paper

Gray wash on off-white paper mounted on light card

Graphite, ink, and collage elements on paper

Graphite on thin off-white wove paper

Black ink on off-white wove paper (recto and verso)

Black ink and graphite on thin buff wove paper

Ink and brown pencil on white wove paper