Untitled (North American air distances, left page); Untitled (metric information, right page)

Colored marker on paper

Colored marker on paper

Graphite on off-white wove paper

Black ink and gray wash on off-white modern laid paper

Brown ink, brown and pink wash over traces of black chalk on cream antique laid paper

Brown wash and graphite on pale gray modern laid paper

Colored marker on paper

Graphite on paper

Colored marker on paper

Black, blue, and yellow crayon on paper and mounted

Black ink and graphite on white paper