[212] Lawrence, W., Lectures on physiology, zoology, and the natural history of man, pp. 511-513. London, 1822.

[213] Latham, Robert Gordon, The Natural history of the varieties of man, pp. 289-291. London, 1850.

[214] Latham, Robert Gordon, Man and his migrations, p. 124. London, 1851.

[215] Pickering, Charles, The races of man, p. 7. London, 1854.

[216] Wilson, Daniel, Physical ethnology. Smithsonian Report for 1862, p. 262. Washington, 1863.

[217] Markham, C. R., On the origin and migrations of the Greenland Esquimaux. J. Roy. Geog. Soc., XXXV, p. 90. London, 1865.

[218] Whymper, Frederick, Travels in Alaska and on the Yukon, p. 214. New York, 1869.

[219] Peschel, Oscar, The races of man, pp. 396-97. New York, 1876.

[220] Kuhl, Dr. Joseph, Die Anfänge des Menschengeschlechts und sein einheitlicher Ursprung, pp. 315-16. Leipzig, 1876.

[221] Dall, W. H., Tribes of the extreme northwest. U. S. Geog. and Geol. Survey, I, pp. 93-105. Washington, 1877.