See Le Page du Pratz.
PUTNAM (A. W.).
History of Middle Tennessee; or Life and Times of Gen. James Robertson. By A. W. Putnam. Nashville; 1859. 8o.
(a) p. 321.
PUTNAM (Prof. F. W.).
The Serpent Mound of Ohio. In The Century Illus. Monthly Magazine, April, 1890. New York. 8o.
(a) p. 871.
RAFN (Charles Christian).
Antiquitates Americanæ. Edidit Societas Regia Antiquariorum Septentrionalium. Studio et opera Charles Christian Rafn. Copenhagen; 1845. Folio.
(a) p. 359. (b) p. 360. (c) p. 397. (d) p. 401. (e) p. 357.