Mondrian #4, 1938-42, Saint Louis Art Museum

Black ink and graphite on white wove paper

Natural black chalk and natural yellow chalk on handmade, green laid paper

Black ink and graphite on white wove paper

Typed colon marks on blue carbon paper

Collage

Colored pencil and graphite on white translucent paper

Black ink and graphite on white wove paper

Four-pointed fine silverpoint and lead white on Italian dark ochre prepared wove paper

Black ink on white wove paper

Watercolor, gouache, black chalk, and graphite on three joined sheets of white wove paper

Gouache

Black ink on white wove paper