Study of a Prehistoric Cave Bear

Transparent and opaque watercolor with gum additions and traces of graphite on off-white modern laid paper

Brown ink and black and red chalk on oatmeal (formerly blue) paper; verso: brown ink and black chalk

Sketch

Black and red marker and black pen on paper

Transparent and opaque watercolor with traces of charcoal on cream wove paper

photograph-based drawing

Graphite on paper

Graphite and white chalk on brown wove paper

Black and white chalk on green laid paper

Graphite on off-white wove paper

Brown ink, gray wash on off-white paper