[XII-42] Bulletin of the U. S. Geol. and Geog. Survey of the Territories, 2d series, No. 1., Washington, 1875.
[XII-43] Ingersoll gives these dimensions as 33 and 22 feet respectively, and speaks of three equi-distant doorways, apparently alluding to the same structure.
[XII-44] Doc. Hist. Mex., série ii., tom. i., pp. 391-2, 434-5, 444-5.
[XII-45] Stevens, in Pac. R. R. Rept., vol. xii., p. 150; Id., in Ind. Aff. Rept., 1854, p. 222.
[XII-46] Pickering's Races, in U. S. Ex. Ex., vol. ix., pp. 41-2.
[XII-47] Abbot, in Pac. R. R. Rept., vol. vi., p. 94.
[XII-48] Lord's Nat., vol. i., p. 296.
[XII-49] Taylor, in Cal. Farmer, March 20, 1863; San Francisco Evening Bulletin, Jan. 22, 1864.
[XII-50] Lewis and Clarke's Trav., p. 369.
[XII-51] Lord's Nat., vol. ii., pp. 102-3, 260; Gibbs, in Pac. R. R. Rept., vol. i., p. 411.