Blue ball point pen diagrams on yellow lined paper

Carbon ink from carbon paper, typed, on cream wove paper

Watercolor over graphite on heavy off-white wove paper

Graphite on off-white wove paper

Graphite on cream wove paper

Gouache over graphite on buff paper mounted on composition board

Watercolor

Black ink over graphite on thin cream tracing paper, mounted to cardboard

Black and red inks and graphite on tracing paper

Graphite on cardboard

Graphite on paper

Black crayon on buff wove paper

Graphite on off-white wove paper