Untitled (blank, front endpaper, left page); Untitled (Piene signature, right page)

Black and red marker on paper

Graphite on paper

Black and red marker on paper

Graphite on paper

Graphite on paper

Black marker on paper

Blue pen on invitation card, adhesive, and colored marker on paper

Graphite on off-white wove paper

Graphite on paper

Brown crayon on paper

Black marker on paper

Black ink and charcoal on cream laid paper