Note 18 — MEXICAN COPPER TOOLS.

The absolute absence of mines in Yucatan is a fact that needs no further corroboration. It might, however, be of interest to hear the language used by Landa, Rel. d. las cosas de Yucatan: 1. c. § 5 “There exist many beautiful structures of masonry in Yucatan, all of them built of stone and showing the finest workmanship, the most astonishing that ever were discovered in the Indies; and we cannot wonder at it enough because there is not any class of metal in this country by which such works could be accomplished.”