Untitled (bleed-through of previous page, left page); Untitled (sketches for light sculptures, right page)

Gray-black and brown inks and watercolor on beige laid paper

Brown ink over black chalk on cream antique laid paper; verso: brown ink

Watercolor on off-white wove paper, set down completely to off-white cardboard

Blue and white colored pencil on tracing paper

Ink on paper

Brown wash and black chalk on cream antique laid paper

Watercolor and white gouache on off-white wove paper

Black crayon on paper

Brown ink over black chalk on cream antique laid paper

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

Graphite on tan wove paper

Paper