George Frederick Kunz, “Gems, Jewelers’ Materials and Ornamental Stones of California,” California State Mining Bureau, Bulletin No. 37, Sacramento, 1905, pp. 71–73. Footnote 51: Plinii, “Historia naturalis,” Lib. xxxvii, cap. 73. Footnote 52: Collection des auteurs Latin, ed. by M. Nazaire; vol. i, Lucain, Silius Italicus, Claudien, text and French trans., Paris, 1850, pp. 737, 738. Footnote 53: Torsten Kolmodin, “Lapparne och deres Land; Skildringar och Studier,” Pt. III, Stockholm, 1914, p. 14. Footnote 54: Nona Lebour, “White Quartz Pebbles and their Archæological Significance”; reprint from Transactions of the Dumfriesshire and Galloway Natural History and Antiquarian Society, January 30, 1914, p. 10. Footnote 55: W. G. Wood-Martin, “Traces of the Elder Faiths of Ireland,” London, 1902, vol. i, p. 331. Footnote 56: Finn Magnussen, “Forsog til Forklaring over nogle Steder af Osian”; Det Skandinaviske Litteraturselskabs Skrifter, 1813, Pt. II, pp. 237, 251. Footnote 57: W. G. Wood-Martin, “Traces of the Elder Faiths of Ireland,” London, 1902, vol. i, p. 330. Footnote 58: Kunz, “Gems and Precious Stones of North America,” New York, 1890, pp. 206–210. Footnote 59: Basher, “Catlinite, Its Antiquity as a Material for Tobacco Pipes,” Am. Nat., vol. xvii, p. 745, July, 1883. Footnote 60: Renel, “Les religions de la Gaule avant le Christianisme,” Paris, 1906, p. 387. Footnote 61: Wirt Sikes, “British Goblins; Welsh Folk-Lore, Fairy Myths, Legends and Traditions,” London, 1880, p. 362. Footnote 62: Renel, “Les religions de la Gaule avant le Christianisme,” Paris, 1906, p. 369. Footnote 63: Ibid., 1906, p. 368. Footnote 64: Paul Sebillot, “The Worship of Stones in France,” trans. by Joseph D. McGuire, _American Anthropologist_, Jan.-Mar., 1902, vol. iv, No. 1, p. 98; citing Société des Antiquaires, vol. i, p. 429. Footnote 65: Martin, “Description of the Western Isles,” in Pinkerton’s “Voyages and Travels,” vol. iii, pp. 646, 627. Footnote 66: Sir Edgar McCulloch, “Guernsey Folk Lore,” London, 1903, p. 150. Footnote 67: Ibid., p. 157; fig. on p. 156. Footnote 68: Kuhn, “Norddeutsche Sagen,” Leipzig, 1848, p. 69. Footnote 69: Hermann, “Die erratischen Blöcke im Regierungsbezirck Danzig,” Berlin, 1911, p. 41; in vol. ii, Pt. I, “Beiträge zur Naturdenkmalpflege,” ed. by H. Conwentz. Footnote 70: Walsh, “Curiosities of Popular Customs,” Philadelphia, 1911, p. 325. Footnote 71: Armand Viré, “Pierres à gravures et Pierres à légendes dans le Lot et le Tarn et Garonne”; in Compte Rendu of the Ninth Session of the Congrès Préhistorique de France, Paris, 1914, p. 349. Footnote 72: Ibid., p. 350. Footnote 73: Dr. Walter Hough in “Handbook of American Indians north of Mexico,” ed. by Frederick Webb Hodge, Smithsonian Inst.; Bur. of Am. Ethn., Bull. 30; Washington, 1910, Pt. 2, p. 194. Footnote 74: