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

Black marker on paper

Graphite on paper

Charcoal on paper

Black ink with traces of charcoal on Asian paper

Graphite on paper

Ink on paper

Black marker on paper

Watercolor on off-white wove paper

Black and aqua marker on paper

Brown ink and brown wash over black chalk on cream antique laid paper, squared in black chalk, laid down on white wove paper, framing line in gold

Colored marker on paper