[13] Athenæum, 16 July, 1859.
[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.