Fall of the Tritt in the Mühlethal Valley, Switzerland

Gouache on cream antique laid paper

Brown ink, brown wash, opaque watercolor and graphite on brown laid paper, adhered overall to a decorative mount

Black ink and gray wash

Watercolor and graphite on off-white laid paper

Brown wash over black chalk on cream antique laid paper; verso: black chalk

Red chalk on cream paper, framing line in graphite

Brown ink, transparent and opaque watercolor, and black, white and red chalks on brown paper

Black ink and gray wash

Gray ink, graphite, and gray wash on cream modern laid paper

Brown and black ink, brown wash over black chalk on off-white wove paper, laid down

Red chalk on buff antique laid paper