Sketches of Four Arms with Swords, for Angel at Far Left, "Israel and the Law," Boston Public Library

Black and red marker on paper

Graphite on cream antique laid paper

Black crayon and ink on paper

Black chalk on parchment, autograph framing line in black chalk

Graphite and colored pastel on gray-green laid paper

Black and colored crayon on off-white wove paper

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)

Black marker on paper

Typed black ink on paper, photographs, adhesive, and black marker on paper

Black pen on paper