Untitled (blank with color transfer, left page); Untitled (starplane designs for Condor, right page)

Black chalk with touches of red and white chalk

Blue pen on paper

Watercolor and graphite on off-white tracing paper mounted to cardboard

Gray wash and graphite

Typewritten text on hole-punched cream wove paper in mylar sheet protector

Graphite with red pastel on off-white modern laid paper

Graphite on paper

Black crayon and ink ; black crayon on paper

Black fiber-tipped ink and Letraset

Colored marker on paper

Graphite and charcoal on off-white wove paper

Watercolor over graphite on cream wove paper