14 “Discours sur les Révolutions du Globe,” third edition, p. 13, Paris, Didot, 1861. 15 _Acad. des Sciences_, 18th and 23d May, 1863. 16 Lubbock: “On the Evidence of the Antiquity of Man Afforded by the Physical Structure of the Somme Valley” (_Nat. Hist_. _Review_, vol. ii.). Prestwich: “On the Occurrence of Flint Implements Associated with the Remains of Extinct Species in Beds of a Late Geological Period” (_Phil_. _Trans_., 1860). Evans: “Flint Implements in the Drift” (_Arch_., 1860–62). 17 _Acad. des Sciences_, 1859, 1863. 18 Cartailhac: “L’Age de Pierre dans les Souvenirs et les Superstitions Populaires.” 19 A short time before his tragic end, the noble and patriotic Gordon sent to Cairo three hatchets or stone wedges found amongst the Niams-Niams, who said they had fallen from Heaven, and who worshipped then with superstitious rites (_Bull. Institut Égyptien_, 1886, No. 14). 20 “Museo Moscardo,” Padova, 1656. 21 According to M. Pitre de Lisle, the Bretons think that these stones vibrate at every clap of thunder. 22 Roulin: _Acad. des Sciences_, December 28, 1868. 23 “Congrès d’Anthropologie et d’Archéologie Préhistorique,” Paris, 1889. 24 Council of Arles in 452, of Tours in 567, of Nantes in 658, of Toledo in 681 and 692, and of Leptis in 743. 25 Baluze: “Capitularia Regum Francorum,” vol. i., pp. 518, 1231, 1237. 26 Steenstrup, Forchammer, Thomsen, Worsaae, and Nillsson. The commission appointed by the Copenhagen Academy of Sciences presented six reports on the subject between 1850 and 1856. 27 “Die Anfang des Eisens Cultur,” Berlin, 1886. 28 “Archéologie Celtique et Gauloise,” p. 46. 29 Dr. Much: “L’Age de Cuivre en Europe et son Rapport avec la Civilisation des Indo-Germains,” Vienna, 1886. Pulsky: “Die Küpfer Zeit im Ungarn,” Budapest, 1884. Cartailhac: “Ages Prehistoriques de l’Espagne et du Portugal,” p. 211. E. Chantre: _Mat_., June, 1887; and Berthelot: _Journal des Savants_, September, 1889. 30 Irenée Cochut: “Thèse presentée à la Faculté de Théologie Protestante de Montauban.” 31 See my translation of the author’s admirable and exhaustive work on “Prehistoric America,” chapters i. and iv.—Nancy Bell. 32 _Académie des Sciences_, May 23, 1881; “Antiquités du Musée de Minoussink,” Tomsk, 1886–7. 33 “Les Âges Préhistoriques en Espagne et en Portugal.” 34 “Stone Implements from the Northwestern Provinces of India,” _Journal of the Asiatic Society of Bengal_, Calcutta, 1883. 35 _Literary Journal of Madras_, vol. xiv. 36 “L’Âge de Pierre et la Classification Préhistorique d’après les Sources Égyptiennes,” Paris, 1879. 37 Pitt Rivers: “On the Discovery of Chert Implements in the Nile Valley,” British Association, York, 1881. 38 Belluci: “L’Eta della Pietra in Tunisia,” Roma, 1876, _Bol. della Soc. Geog. Italiana_, 1876. 39 “The Stone Age of South Africa,” _Journ. Anth. Institute_, 1881. 40 _Revue des Deux-Mondes_, march 1, 1878. 41 De Quatrefages: _Rev. d’Ethnographie_, 1883, p. 97, etc.