Jordan Summers, 60 Hikes Within 60 Miles: Sacramento: Including Auburn, Folsom, and Davis, Birmingham, Alabama, Menasha Ridge Press, (ISBN0897326040, lire en ligne), p. 120
« The Congressional Globe », A Century of Lawmaking for a New Nation: U.S. Congressional Documents and Debates, 1774-1875, : « From the Calaveras grove some sections of a fallen tree were cut during and pending the great World’s Fair that was held in London some years since. One joint of the tree was sectionized and transported to that country in sections, and then set up there. The English who saw it declared it to be a Yankee invention, made from beginning to end; that it was an utter untruth that such trees grew in the country; that it could not be », p. 2301
