“The Missouri was a stream thirty miles wide.” “Hayden,” p. 255. For the facts on which this paragraph rests, see Report of Samuel Aughey, Ph.D., in “U.S. Survey of the Territories, for 1874,” p. 243, _et seq._ “American Assoc. Rep.,” 1880, p. 720. “Illinois Geological Reports,” Vol. III, p. 123. “Prehistoric Races,” p. 69. Jones’s “Antiquities of the Southern Indians,” p. 293. Jones’s “Antiquities of the Southern Indians,” p. 295. Quoted by Abbott’s “Primitive Industry,” p. 3. Peet’s “Archæology of Europe and America,” p. 11. Short’s “North Americans of Antiquity,” p. 27. Up to the present time (1884) Dr. Abbott has collected over 20,000 specimens of stone implements, and all his more recent “finds” but confirm the opinion he expressed as to their significance ten years ago. His collection is at the Peabody Museum of Archæology, at Cambridge, Mass. (See last Peabody Report.) “Nature,” Vol. XI, p. 215. Ibid. “Nature,” Vol. XI, p. 215. Ibid. “Primitive Industry,” Abbott, p. 506. Seventeenth Report Peabody Museum, p. 354 and note. “Primitive Industry,” p. 551. “Studies in Science and Religion,” p. 324. Ibid., p. 324. We believe that similar results will attend the careful exploration in other sections. As bearing on this subject, it is interesting to know that Paleolithic implements are reported from one locality in Mexico. Our information in regard to them is very slight. (Brit. Assoc. Reports, 1881; Pres. Address, Count De Saporte, _Popular Science Monthly,_ Sept., 1883.) Dana’s “Manual of Geology,” p. 540. “Geographical and Geological Survey,” 1874, p. 254. Abbott’s “Primitive Industry,” p. 483. Abbott: “Proceedings of the Boston Society of Natural History,” Vol. XXII, p. 102. “Primitive Industry,” p. 512. “Primitive Industry,” p. 512. U.S. survey West of the 100th Meridian,” Vol. VII, p. 12. Abbott’s “Primitive Industry,” p. 520. Ibid., p. 519. U.S. Geographical Survey of the Rocky Mountain Region,” Vol. I, p. 102, quoted from “Primitive Industry,” p. 519. _Popular Science Monthly,_ Jan., 1883. DeCosta’s “Precolumbian Discovery of America,” p. 69. Winchell’s “Preadamites,” p. 389. Brinton’s “Myths of the New World,” p. 23. Note. Prof. DeHass’s “Paper” read before Am. Assoc., 1882. See chapter, “Cave-men,” p. 113. Note. See remarks of Prof. Boyd Dawkins quoted earlier. Chapter X THE MOUND BUILDERS.1