Untitled (bleed-through of previous page, left page); Untitled (Gottfried Wilhelm Leibniz, right page)

Black crayon on paper

Black marker and ink on paper

Blue marker and graphite on paper

Black and metallic marker on paper

Graphite on paper

Colored crayons on paper

Black marker on paper

Colored marker on paper

Red and blue pen on paper

Graphite on paper

Graphite and watercolor on paper

Colored crayon on paper