Ancient Aqueduct at the Porta Pio, Rome

Black and brown ink, and brown wash over graphite, with touches of white gouache, on cream antique laid paper, framing lines in black ink

Black and white chalk on tan antique laid paper, framing lines in black chalk

Verso: watercolor and black ink over traces of graphite on cream antique laid paper

Graphite, gouache, and watercolor on white wove paper

Brown ink, black chalk, and graphite with guidelines in graphite on cream antique laid paper

Red chalk on paper; verso: red and black chalk

Pastel over traces of black chalk on blue antique laid paper

Brown ink on white wove paper

Graphite, red chalk and touches of black chalk on off-white antique laid paper

Watercolor on white antique laid paper

Black ink and gray wash over graphite on tracing paper mounted on white laid paper

Black ink, brown wash, and watercolor over traces of black chalk on off-white antique laid paper, framing lines in black ink, laid down on cream antique laid paper with blue antique laid paper borders adhered to face