Portrait of Charles-Marie de la Condamine (1701-1774)

Graphite, black wash, and white chalk on tan paperboard

Brown ink on cream tracing paper

Brown ink on cream laid paper

Black crayon, squared in graphite, on off-white antique laid paper

Graphite, white chalk, and charcoal or black chalk on tracing paper, laid down

Black lithographic crayon and scratchwork on tracing paper, mounted on cardboard

Charcoal on tan wove paper

Watercolor, graphite, colored pencil and black ink on off-white wove paper

Black chalk, brown ink, brown and gray wash, white gouache on gray wove paper

Watercolor and graphite on off-white wove paper

Black crayon over graphite, squared in black crayon, on off-white antique laid paper