Tree, from the Background of a Picture by an Early Flemish Master, in the Uffizi Gallery at Florence

Black and blue crayon on paper

Watercolor, gouache, and black ink on off-white wove paper

Graphite on heavy laid paper

Black ink on off-white wove paper

Graphite on cream modern laid paper

Black crayon on white wove paper

Black ink, charcoal, and watercolor on cream laid paper

Black ink on tan wove paper

Gray ink and gray wash over graphite on cream antique laid paper, with a framing line in brown ink

Colored marker and blue pen on paper

Black crayon on paper

Watercolor, heavily sized, with touches of graphite on tan laid paper