Untitled (blank with color transfer, left page); Untitled (starplane designs for Condor, right page)

Black ink on off-white wove paper

Colored marker on paper

Watercolor over graphite on brown cardboard, mounted to cardboard

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

Watercolor and blue pencil on white wove paper

Brown ink on parchment

Red and black marker and blue ink on paper

Black ink and graphite on white wove paper

Colored marker on paper

Brown ink over graphite on cream wove paper

Charcoal, graphite, and white chalk on blue wove paper

Graphite on paper