Untitled (bleed-through of previous page, left page); Untitled (design for light work ["Foucault" pendulum], right page)

Pastel, graphite and black ink on tan laid paper

Black chalk and gray wash on cream antique laid paper

Graphite on darkened off-white wove paper

Graphite on pale gray modern laid paper, slightly discolored

Brown wash over traces of black chalk on off-white antique laid paper

Black ink with inclusions on off-white wove paper

Black ink on off-white wove paper

Graphite and colored pencil on paper

Colored marker and black pen on paper

Black ink on off-white wove paper (recto and verso)

Black ink and graphite on off-white wove paper

Black crayon on paper