Putnam, F. W. Archæological Explorations in Tennessee, p. 307. 1878.
Schmidt, E. Archiv für Anthropologie, vol. II, pp. 65 ff. North America. 1879.
Butler, J. D. American Antiquarian, vol. 3, p. 33. 1880.
Lewis, T. H. American Antiquarian, vol. 11, p. 293. 1889.
Montgomery, H. Proceedings of the American Association for the Advancement of Science, 1889, p. 344. 1889.
Henshaw, H. W. American Anthropologist, vol. 3, p. 103. 1890.
Packard, R. L. American Antiquarian, vol. 15, pp. 67 and 152. 1893.
Thomas, C. American Archæology, p. 109. 1898.
Hamilton. American Archæologist, 1898, p. 158. 1898.
Laidlaw, G. E. American Antiquarian, vol. 21, p. 83. Ontario. 1899.