[54] Primitive Industry, p. 244.
[55] Stevens; Flint Chips, p. 95.
[56] Ibid., p. 96. Morgan; League of the Iroquois, p. 381.
[57] Stevens; Flint Chips, p. 499.
[58] Dale, L.; in Journal of Anth. Inst. of Great Br. and Ireland, vol. I, p. 347.
[59] Layard, E. L.; in ibid., appendix, c.
[60] Griesbach, C. L.; in ibid., p. cliv.
[61] W. D. Gooch says they were used as club heads by the predecessors of the Bushmen, who now use them as diggers; ibid., vol. XI, p. 128.
[62] Knight, E. H.; in Smithsonian Report for 1879, p. 232.
[63] Stone Implements, p. 194.