[1]Alfred L. Kroeber, “Native American Population,” _American Anthropologist_, 36:24 (1934). Herbert J. Spinden, “The Population of Ancient America,” _Smithsonian Institution Annual Report for 1929_ (1930), 470. [2]Nels C. Nelson, “The Antiquity of Man in America in the Light of Archaeology,” in _The American Aborigines_, ed. Diamond Jenness (1933), 97. [3]Alfred L. Kroeber, _Anthropology_ (1923), 98. [4]Franz Boas, “Relationships Between Northwest America and Northeast Asia,” in _The American Aborigines_, 367-368. [5]John P. Harrington, personal communication, 1947, and “Southern Peripheral Athapaskawan Origins, Divisions, and Migrations,” _Smithsonian Miscellaneous Collections_, 100:504 (1940). [6]Edgar B. Howard, “An Outline of the Problem of Man’s Antiquity in North America,” _American Anthropologist_, 38:398 (1936). [7]W. W. Howells, “The Origins of the American Indian Race Types,” _The Maya and Their Neighbors_ (1940), 5. [8]Albrecht Penck, “Wann kamen die Indianer nach Nordamerika?” _Proceedings, 23rd International Congress of Americanists_ (1930), 23-30. [9]Kroeber, _Anthropology_, 336-339. [10]Clark Wissler, “Ethnological Diversity in America and Its Significance,” in _The American Aborigines_, 188. Chapter 2 [1]Nels C. Nelson, “The Antiquity of Man in America in the Light of Archaeology,” in _The American Aborigines_ (1933), 89. [2]Padre Joseph de Acosta, _The Natural and Moral History of the Indies_ (transl. Edward Grimston, 1604), ed. Clements R. Markham (1880), 1:45, 57. [3]Edward Brerewood, _Enquiries Touching the Diversity of Languages, and Religions, Through the Chief Parts of the World_ (1622—1st ed., 1614), 96, 97. [4]Fray Gregorio García, _Origen de los Indios de el Nuevo Mundo_ (1719—1st ed., 1607), 315. [5]Voltaire, _La Philosophie de l’Histoire_ (1765), 46. [6]Alexander von Humboldt, _Political Essay on the Kingdom of New Spain_ (1822), 153, 155. [7]Reginald A. Daly, _The Changing World of the Ice Age_ (1934), 47, 182. Ernst Antevs, _The Last Glaciation_ (American Geographical Society Research Series, No. 17, 1928), 81. Richard F. Flint, _Glacial Geology and the Pleistocene Epoch_ (1947), 432-433. [8]Aleš Hrdlička, “The Coming of Man from Asia in the Light of Recent Discoveries,” _Proceedings, American Philosophical Society_, 71:399 (1932). [9]Richard F. Flint and H. G. Dorsey, “Glaciation in Siberia,” _Bulletin, Geological Society of America_, 56:98 (1945). [10]James W. Gidley, “Paleontological Evidence Bearing on the Problem of the Origin of the American Aborigines,” _American Anthropologist_, 14:22 (1912). [11]Hrdlička, _op. cit._, 398. [12]Frank Hibben, “Evidence of Early Man in Alaska,” _American Antiquity_, 8:254-259 (1943). Hrdlička, _op. cit._, 399.