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

Black crayon on paper

Black chalk on white wove paper

Graphite on cream wove paper

Black marker on paper

Colored marker and opaque watercolor on paper

Colored marker on paper

Brown ink and graphite on tan wove paper

Sketchbook with marble paper covers, leather spine and corners; 34 pages

Charcoal and black ink on cream laid paper

Watercolor on off-white Japanese paper

Graphite on paper, mounted

Colored marker on paper