Facade of Santa Balbina on the Aventine

Black and red marker on paper

Black and white chalk, brown and gray wash, and white opaque watercolor on brown prepared laid paper

Black marker on paper

Black crayon on paper

Black chalk on cream antique laid paper

Colored crayons on paper

Red marker, blue pen, paper, and tape on paper

Graphite, black chalk, pastel and lithographic crayon? with scratchwork and stumping on smooth surfaced multi-ply cream wove paper

Graphite, fixed, on cream laid paper

Black and white chalk on discolored blue antique laid paper

Graphite on ivory wove paper

Colored marker on paper