Untitled (bleed-through of previous page, left page); Untitled (sketch of "Charles River Rainbow," right page)

Graphite on paper

Black ink on off-white wove paper

Oil paint on offset lithograph, 1989 edition of Flora de la Real Expedición Botánica del Nuevo Reino de Granada (1783-1810)

Graphite on off-white tracing paper

Graphite on cream wove paper

Graphite and ink on paper

Graphite and colored pencil on paper

Beeswax, graphite, detritus and debris on wove paper

Black chalk and gray wash on white antique laid paper, remains of a framing line in brown ink, mounted on antique laid paper

Charcoal and black crayon, with stumping, on off-white wove paper

Red chalk on light tan antique laid paper