Note III-7 — Chapter III · ANTIQUITIES OF SALVADOR AND HONDURAS. RUINS OF COPAN.
Reading edition
Squier's Cent. Amer., pp. 132-3; Scherzer's Trav., vol. ii., p. 95; Id., Wanderungen, p. 371; Wappäus, Geog. u. Stat., p. 310; Harper's Mag., vol. xix., p. 610, with a cut of the mastodon's tooth.