Unfinished Study of Lioness and Cubs, from the North-West Door of the Duomo of Florence

Black crayon or charcoal on paper

Brown ink and brown wash over black and red chalk on off-white antique laid paper; verso: black chalk

Black crayon on paper

Red and white chalk on tan antique laid paper

Graphite on paper

Graphite, gray wash, watercolor, and black chalk on cream antique laid paper

Graphite on white wove paper

Graphite on paper

Black ink, gray and brown wash, and transparent watercolor, with a framing line in brown ink, on cream antique laid paper

Graphite on paper

Graphite and colored pencil on paper

Black and red chalk on paper