Landscape with the Ponte Molle (Pons Milvius) over the Tiber outside Rome

Transparent and opaque watercolor over graphite on parchment, framing line in brown ink

Brown ink and black chalk on off-white antique laid paper; verso: black chalk

Brown ink, gray and brown wash over black and red chalk on off-white antique laid paper, incised, framing line in brown ink, mounted on a gilt and hand-colored mount of blue paper

Brown ink, brown wash, and white opaque watercolor on white antique laid paper

Gouache, watercolor, and black chalk on cream antique laid paper

Black chalk on parchment, autograph framing line in black chalk

Brown ink and gray wash over black chalk and graphite, and touches of white opaque watercolor on off-white antique laid paper, framing line in gray ink

Brown ink and black and red chalk on oatmeal (formerly blue) paper; verso: brown ink and black chalk

Black chalk, charcoal, and brown and gray wash on cream antique laid paper, framing lines in brown and black ink

Brown ink, brown wash and black chalk, with a framing line in brown ink, on off-white paper, laid down

Black ink, gray wash, black chalk, and white opaque watercolor on tan antique laid paper

Black and white chalk on blue paper