Detail of Ceiling, S. Maria in Aracoeli, Rome, Italy

Graphite on paper

Black ink on gray-blue laid paper

Black and colored chalks on brown laid paper

Graphite on paper

Black ink and white-gray gouache on grayish-white textured wove paper

Tempera on acetate over brown and green tissue paper collage elements, and black ink on Japanese paper

Graphite on paper

Black chalk and charcoal on off-white laid paper

Graphite on buff wove paper

Graphite on off-white wove paper

Blue and black ink and blue ball point pen on onionskin

Casein, graphite and black ink on gessoed white wove paper (Fabriano)