'Limestone Formation, on Pitt River', 1872. Geological feature near the Pit River in Northern California, USA. 'Here the Indians, known by the name of the river, are mostly to be found, encamped in great numbers on the plain...The river is quite rapid, but neither broad nor deep. It abounds in salmon...This accounts for the presence of the Indians, who secure the fish by spearing'. From "Picturesque America; or, The Land We Live In, A Delineation by Pen and Pencil of the Mountains, Rivers, Lakes...with Illustrations on Steel and Wood by Eminent American Artists" Vol. I, edited by William Cullen Bryant. [D. Appleton and Company, New York, 1872]