Jasper.

Mercer, H. C. The Archæologist, vol. 1, p. 1. 1893.

American Anthropologist, vol. 7, p. 80. 1894.

Van Epps, P. M. The Archæologist, vol. 2, p. 29. 1894.

Laubach, C. American Archæologist, 1898, pp. 144, and 265. 1898.

Jet.

Pepper, G. H. American Anthropologist, vol. 7, n. s., pp. 191 ff. 1905.

Knives.

Nissly, J. R. The Archæologist, vol. 1, p. 67. 1893.

Smith, W. G. “Man, the Primeval Savage,” p. 247. 1894.