Untitled (view of New York City "from the Colony Club," two-page spread)

Black and gray opaque watercolor over graphite on graph paper

Black chalk on gray-brown antique laid paper; verso: black chalk

Pen and ink on cream colored paper

Watercolor on white antique laid paper

Black ink and gray wash over graphite on off-white wove paper

Graphite on paper

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

Watercolor on paper

Transparent and opaque watercolor and graphite on white wove paper

Colored marker on paper

Black ink, gray wash and graphite on white paper; verso: graphite

Red, black, white and yellow chalk, with the red chalk moistened with water or oil, white and red opaque watercolor on oatmeal paper, framing line in black ink, laid down