Untitled (blank with graphite transfer, left page); Untitled (notes and designs for Condor planes, right page)

Pastel with charcoal on paper

Graphite, black and red felt-tipped pen on off-white wove paper

Black crayon on paper

Colored marker and black pen on paper

Graphite on off-white wove paper

Graphite on paper

Brown ink, brown wash and oxidized white opaque watercolor over black chalk on cream antique laid paper, framing line in black ink

Colored marker and black pen on paper

Colored crayons on paper

Olive crayon on paper

Graphite on paper