La Science

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

Red chalk heightened with white gouache on off-white antique laid paper

Red and white chalk on tan antique laid paper, laid down

Red chalk on cream antique laid paper; verso: black chalk

Brown ink and brown wash heightened with white gouache over red chalk on cream antique laid paper

Brown ink on magenta prepared antique laid paper

Black chalk on blue gray antique laid paper

Brown ink and black chalk with traces of white gouache on cream antique laid paper, lined overall with Japanese paper

Brown ink and brown wash heightened with white gouache on blue antique laid paper, laid down overall to cream modern laid paper

Red chalk on tan antique laid paper; verso: red chalk

Black chalk on beige antique laid paper; verso: black chalk

Brown ink over black chalk on cream antique laid paper