Untitled [Sailing Ship]; verso: Untitled [Ship with Four Masts]

Colored marker on paper

Graphite on paper

Graphite on 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 ink and charcoal on cream laid paper

Watercolor on off-white wove paper

Watercolor over graphite on off-white wove paper

Graphite and colored pencil on paper

Black marker on paper

Graphite on paper

Copperpoint with fire and smoke on prepared paper

Colored marker, blue pen, and adhesive label on paper