schen Atlas_, p. 78. Gotha, 1905.

[203] _Ibid._, p. 80.

[204] Hugh R. Mill, International Geography, p. 878. New York, 1902.

[205] Hans Helmolt, History of the World, Vol. I, pp. 189-191. New York,
1902-1906.

[206] Hodgkin, Italy and Her Invaders, Vol. VI, pp. 23-27, 38-42, 63-68,
83-87. Oxford, 1896.

[207] McGee and Thomas, Prehistoric North America, Chap. XXI, Vol. XIX
of _History of North America_, Philadelphia, 1905.

[208] _Ibid._, pp. 83, 87, Map of Migrations, p. 3.

[209] Archibald Little, The Far East, pp. 34-38. Oxford, 1905.

[210] Strabo, Book VIII, chap. I, 2.

[211] Heinrich Barth, Travels in North and Central Africa, Vol. II, p.
548. New York, 1857.

[212] Joseph Partsch, Central Europe, pp. 104-105. London, 1903.

[213] E.F. im Thurn, Among the Indians of Guiana, pp. 167-171, 202-207.
London, 1883.

[214] W.Z. Ripley, Races of Europe, p. 237. New York, 1899.

[215] _Ibid._, p. 469.

[216] H. Barth, Human Society in Northern Central Africa, _Journal of
the Royal Geog. Society_, Vol. XXX, p. 116. London, 1860.

[217] Moritz Wagner, _Die Entstehung der Arten durch raeumliche
Sonderung_. Basel, 1889.

[218] H.W. Conn, The Method of Evolution, pp. 282-295. New York, 1900.

[219] McGee and Thomas, Prehistoric North America, pp. 418, 424, Vol.
XIX of _History of North America_. Philadelphia, 1905.

[220] Ratzel, History of Mankind, Vol. II, pp. 280-283. London,
1896-1898.

[221] Caesar, _Bella Gallico_, Book II, chap. IV.

[222] H. Helmolt, History of the World, Vol. VI, pp. 32-33. New York,
1902-1906.

[223] Hodgkin, Italy and Her Invaders, Vol. I, Part I, pp. 75, 81, 82.
Oxford, 1895.

[224] W.Z. Ripley, Races of Europe, pp. 34, 341-342. New York, 1899.

[225] H. Helmolt, History of the World, Vol. III, pp. 400, 417, New
York, 1902-1906.

[226] A.C. Haddon, The Study of Man, p. xix. New York and London, 1898.

[227] James Bryce, Migrations of the Races of Men Considered
Historically, _Scottish Geographical Magazine_, Vol. VIII, pp. 400-421.
May, 1892.

[228] Eleventh Census, _Report on the Indians_, pp. 34-35. Washington,
1894.

[229] H. Helmolt, History of the World, Vol. III, p. 42. New York,
1902-1906.

[230] Ratzel, History of Mankind, Vol. II, pp. 279-283, London, 1896-98.

[231] Jerome Dowd, The Negro Races, Vol. I, pp. 47-48, 61-62. New York,
1907.

[232] Sweden, Its People and Its Industries, p. 93. Edited by G.
Sundbaerg, Stockholm, 1904.

[233] Sir Joh