Study of a Bird (Mergus albellus, or "smew")

Black chalk on blue antique laid paper

Black chalk and gray wash on brownish-gray prepared paper

Black and white chalk on blue paper

Brown and black ink, gray wash, and black chalk, on cream antique laid paper, with a framing line in brown ink

Brown ink and brown wash on cream antique laid paper, with a framing line in brown ink

Transparent watercolor, black ink and black chalk on cream antique laid paper, double framing line in brown ink and partial black chalk

Black, red, and white chalk, on light tan antique laid paper, partial framing lines in brown ink and black chalk

Brown ink on parchment

Black chalk, charcoal, and brown and gray wash on cream antique laid paper, framing lines in brown and black ink

Opaque and transparent watercolor over graphite on parchment, mounted down

Transparent and opaque watercolor, gray ink over graphite on parchment

Brown ink and gray wash over black chalk, with later additions of dark gray wash and white and yellow opaque watercolor, on off-white antique laid paper; verso: brown ink and gray wash over black chalk