Untitled (bleed-through of previous page, left page); Untitled (measurements for "water cube," right page)

Black ink, graphite, and touches of yellow gouache on faded blue-green wove paper; verso: graphite with touches of black ink

Blue pen on paper

Red and black marker and blue ink on paper

Graphite on cream wove paper

Transparent and opaque watercolor over graphite on off-white wove paper

Black ink on paper

Black crayon on cream wove paper

Colored crayons on paper and mounted

Red chalk on tan wove paper

Gouache on off-white wove paper

Charcoal on white wove paper

Watercolor over graphite on off-white wove paper