[175] Holub, E., in Jour. Anth. Inst. Gt. Br. and Ird., vol. X, p. 460.
[176] Stone Implements, p. 48.
[177] Native Races, vol. I, p. 189.
[178] Hayden Surv., Bul. 3, 1877, p. 43.
[179] Brickell; Nat. Hist. of N. C., p. 339.
[180] Antiq. of the Southern Indians, p. 230.
[181] Stone Implements, p. 46.
[182] Stevens; Flint Chips, p. 96. Tylor; Early History of Mankind, p. 188.
[183] It would seem that in using a wood or horn drill, water would be a disadvantage, as the drill would swell and wear rapidly away when wet, thus choking the bore. The sand also would be forced into the drill instead of sticking to its surface, thus being less effective.
[184] Quoted by Dawson; Fossil Men, p. 124.