La Science

Brown ink and brown wash heightened with white gouache over black chalk on blue antique laid paper

Brown ink on tan antique laid paper

Brown ink with two colors of brown wash over black chalk, heightened with white gouache, on blue antique laid paper; verso: brown ink and black chalk, drum-mounted to a wove decorated paper mount

Red chalk on cream antique laid paper

Brown ink and brown wash on off-white antique laid paper

Brown ink and gray wash on tan antique laid paper

Oiled black chalk heightened with white on tinted tan antique laid paper

Brown ink and brown wash on brown antique laid paper

Brown ink and brown wash on cream antique laid paper, incised

Black chalk on cream antique laid paper, framing line in graphite

Brown ink on buff antique laid paper, laid down

Brown ink on off-white antique laid paper, laid down on white card