[Footnotes]
[1.] Thirty-first Congress, first session, Senate Ex. Doc. No. 64, Washington, 1850.
[2.] Western Wilds, and the Men who Redeem Them: Cincinnati, Philadelphia, Chicago, Memphis, 1878.
[3.] U.S. Geog. Surveys West of the 100th Meridian, Lieutenant George M. Wheeler in charge; reports, vol. VII, Archæology; Washington, 1879, pp. 372-373, pl. xx.
[4.] Bull. Am. Geog. Soc., 1886, No. 4; Ancient Habitations of the Southwest, by James Stevenson.
[5.] Century Magazine, October, 1890, vol. XL, No. 6, p. 806 et seq.
[6.] U.S. Geol. Survey, F. V. Hayden in charge; 10th Ann. Rept. (for 1876), Washington, 1878.
[7.] The Land of the Cliff Dwellers, by Frederick H. Chapin; Boston, 1892.
[8.] Bull. Am. Geog. Soc., vol. XXIII, No. 4, 1891; The Cliff Dwellings of the Cañons of the Mesa Verde.