Illustration for Doctor Doolittle (The Doctor at the Zoo)

Graphite on tan wove paper

Watercolor, white gouache, and graphite on buff paper

Charcoal on cream wove paper

Graphite and red crayon on cream paper

Brown and white chalk on beige wove paper; verso: brown chalk

Gold paint on blue paper

Red chalk on tan wove paper

Black ink and graphite on off-white wove paper; verso: graphite

Watercolor over graphite on white paper

Charcoal on cream wove paper

Graphite and colored pencil on photocopy

Black fiber-tipped ink and Letraset