Geological Sketches, Bird's Skull

Brown ink on cream wove paper with herringbone pattern from dandy roll

Watercolor and gouache on wove paper mounted on panel

Red ink, gray and pink wash, and graphite on cream paper, laid down

Graphite on white wove paper

Black ink and graphite on white wove paper

Graphite on cream modern laid paper

Watercolor and black ink on cream paper

Verso: Dark brown ink on cream modern laid paper

Blue and gray wash and graphite on off-white wove paper

Graphite on cream wove paper

Black chalk on cream modern laid paper

Red chalk, squared, on rice paper