[85] _Ibid._, Vol. I, pp. 231-232, 241.

[86] Roosevelt, The Winning of the West, Vol. I, pp. 70-73, 88. New
York, 1895.

[87] McGee and Thomas, Prehistoric North America, pp. 392-393, 408, Vol.
XIX, of _History of North America_, edited by Francis W. Thorpe,
Philadelphia, 1905. _Eleventh Census Report on the Indians_, p. 51.
Washington, 1894.

[88] Hans Helmolt, History of the World, Vol. II, pp. 249-250. New York,
1902-1906.

[89] Spencer and Gillen, Northern Tribes of Central Australia, pp.
13-15. London, 1904.

[90] Ratzel, History of Mankind, Vol. I, p. 126. London, 1896-1898.

[91] Roscher, _National-Oekonomik des Ackerbaues_, p. 24. Stuttgart,
1888.

[92] Ratzel, History of Mankind, Vol. I, p. 131. London, 1896-1898.

[93] Paul Ehrenreich, _Die Einteilung und Verbreitung der Völkerstämme
Brasiliens_, Peterman's _Geographische Mittheilungen_, Vol. XXXVII, p.
85. Gotha, 1891.

[94] Roscher, _National-Oekonomik des Ackerbaues_, p. 26, Note 5.
Stuttgart, 1888.