Untitled [Men Working, Belgium]; verso: Untitled [Houses with Color Indications]

Colored crayon on paper

Graphite on off-white wove paper

Black and white chalk and charcoal on blue laid paper

Black and white chalk and brown ink on faded blue laid paper

Black marker on paper and adhesive on paper

Graphite on cream wove paper

Watercolor and white gouache over graphite on heavy cream wove paper

Graphite on off-white wove paper

Graphite and turquoise wash, incised with a stylus on tracing paper, backed.

Copperpoint, fire, smoke, wax, on prepared paper

Graphite on paper

Black ink on two joined sheets of green prepared paper