Sketch for the 1967 performance at the Walker Art Center entitled "The Proliferation of the Sun"

Colored crayon on paper

Black crayon on paper

Graphite on paper

Colored marker on paper

Colored inks on illustration paper

Graphite on paper

Colored marker on paper

Black ballpoint ink and graphite on white wove paper

Black crayon on paper

Black ink on off-white laid paper

Graphite on paper

Graphite on paper