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

Black chalk on off-white antique laid paper; verso: red chalk and brown ink

Graphite on off-white paper

Brown ink, black chalk and incidental or accidental green wash on cream antique laid paper; framing line in graphite and brown ink

Graphite on paper

Black and red chalk and gray wash on cream antique laid paper, with a framing line in black chalk

Colored marker on paper

Black marker on paper

Graphite and colored crayons; graphite and colored crayon on paper

Graphite on cardboard

Black chalk on off-white antique laid paper

Colored marker on paper

Graphite on heavy cream wove paper