Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Workshop wall and sill: details (full size)

Watercolor over graphite on cream card

Black ink and graphite on off-white wove graph paper

Graphite on paper

Graphite on off-white wove paper

Charcoal on buff wove paper

Watercolor on cream wove paper

Graphite on off-white wove paper

Black and blue crayon on paper and mounted

Graphite on paper

Graphite on off-white wove paper

Watercolor and white gouache over black chalk on ivory wove paper

Graphite and stumping on white wove paper