Diagram, Walls C and D of Wall Drawing #830 (Four Isometric Figures With Color Ink Washes Superimposed)

Black ink, graphite, and yellow chalk on off-white wove paper

Graphite on cream wove paper

Black pen and ink on beige-yellow, smooth, wove paper

Black ink on off-white handmade rag laid paper

Black ink and graphite on off-white wove paper

Pastel on cardboard

Black ink on white wove paper

Crayon on paper

Graphite on paper

Graphite on buff wove paper

Black ballpoint ink on brown cardboard

Graphite on off-white wove paper