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

Black chalk and white gouache, with later additions of red, brown and ocher chalks, on blue antique laid paper, mounted overall to coarse antique laid card.

Black and white chalk on blue antique laid paper, faded to green-brown, mounted down

Red marker and black pen on paper

Graphite on heavy white Bristol board

Charcoal on off-white laid paper

Colored marker on paper

Black ink, graphite, and yellow chalk on cream wove paper

Graphite on thin off-white wove paper

Graphite and colored washes on paper

Black ink on heavy off-white wove paper

Colored marker on paper