Untitled (bleed-through of previous page, left page); Untitled (measurements for "water cube" on adhered fax copy and group sequence, right page)

Graphite on back of letter

Graphite on paper

Black and white chalk on light tan antique laid paper, mounted

Black marker on paper

Graphite on slightly darkened off-white wove paper

Charcoal and black ink on cream laid paper

Black crayon on paper

Black crayon on paper

Colored crayons on paper

Graphite and colored crayons ; graphite on paper

Colored marker on paper

Brown ink and white opaque watercolor on off-white antique laid paper, partial framing line in brown ink