Geological Sketches, Bird's Skull

Graphite on heavy cream wove paper

Transparent and opaque watercolor, black chalk, and graphite on gray wove paper

Graphite and white gouache and black ink on gray paper

Watercolor and graphite on cream wove paper

Sketchbook with marbled cardboard covers; 46 pages

Brown ink and gray and red-brown wash over graphite on cream paper

Graphite on cream wove paper, darkened

Watercolor, black ink, graphite, and black chalk on off-white antique laid paper

Gray and blue-gray wash over graphite on cream wove paper

Pastel and graphite on coarse brown laid(?) paper

Graphite and white gouache on gray-green paper

Watercolor, white gouache, graphite, and black chalk on gray-beige wove paper, darkened