Untitled (notes on planets and bleed-through of previous page, left page); Untitled (calculations on back endpaper, right page)

Graphite on off-white wove paper

Ink on paper

Brush and brown wash on off-white modern laid paper, bordered in graphite

Watercolor and white gouache over graphite on cream wove paper

Colored marker on paper

Colored marker on paper

Graphite on off-white wove paper

Watercolor on cream wove paper

Graphite on darkened wove paper

Watercolor on off-white card

Graphite and colored pencil on cream wove paper

Brown, red and white chalk on blue-green wove paper