Study of a Wolf's head; verso: Partial Studies of Oxen

Blue paint, with scratchwork, over a postcard

Charcoal with touches of white chalk on blue paper faded to brown

Colored marker and blue pen on paper

Colored marker on paper

Watercolor and gum arabic over graphite on off-white wove paper

Pencil on gray paper

Watercolor and white gouache over graphite on off-white wove paper

Black and white chalk on tan antique laid paper; verso: black chalk

Colored marker and black ink on paper

Watercolor and black ink over traces of graphite on off-white antique laid paper, adhered to cream antique laid paper

Blue marker on paper

Brown ink, brown wash and white opaque watercolor with scratchwork on cream antique laid paper, framing line in brown ink