Note 441 — Chapter XIII · WAR CUSTOMS OF THE NAHUAS.
Reading edition
Ixtlilxochitl mentions clubs studded with iron, but it is well known that the Aztec nations had no knowledge of that mineral, although it is said they possessed the art of being able to temper copper to the hardness of steel, 'porras claveteadas de hierro, cobre y oro.' Ixtlilxochitl, Relaciones, in Kingsborough's Mex. Antiq., vol. ix., p. 332.