Inquisition, Aztec sacrifices compared to the, i. 98. Intemperance, i. 48, 171. Intercalation, among the Aztecs, i. 127, _note_, 129, _note_. Persian, 127, _note_, 248. Interpreters. See _Aguilar Marina_, and _Melchorejo_. Iron, not known to the Aztecs, i. 154, 260, 270. Substitutes for, 155. On the table-land in Mexico, 270, 271. The early use of, 271, _note_. Irrigation, i. 150. See _Canals_. Irving, Washington, i. 341, _note_, iv. 148, _note_. Isabella, suppressed _repartimientos_, i. 285. Isla de los Sacrificios, i. 294. Israelites, i. 144, 242, ii. 267, _note_, 332. Itzalana, i. 258. Itzocan, conquered, iii. 231. Itztli, tools made of, i. 155. Weapons pointed with, ii. 131, 134. Blades of, 134. Ixtlilxochitl, cacique of Tezcuco, account of, iii. 270. Instructed and watched, 282. Procures allies, 323, iv. 19. Efficiency of, iv. 19, 23. Kills the Aztec leader, 23. Does not desert, 56. Ixtlilxochitl, son of Nezahualpilli, rival for the Tezcucan crown, ii. 8, 177, 367. Embassy from, to Cortés, 177. Ixtlilxochitl, the historian, on the extent of Anahuac, i. 14, _note_. His opinion of the Toltec records, 15, _note_. On feudal chiefs, 39, _note_. On halls of justice and judgments in Tezcuco, 7. On the cycles, 75, _note_. On sacrifices at the dedication of the temple of Huitzilopochtli, 93, _note_. On measures for procuring victims, 96, _note_. On Mexican hieroglyphical writers, 113, _note_. On the divine book, 122, _note_. Story by, 164, _note_. Notices of, and of his writings, 220, _note_. Source of the materials of his works, 187, _note_, 220, _note_. Translation by, of a poem of Nezahualcoyotl, 188, iv. 272. Cited, i. 190, _note_. On the population of Tezcuco, 191, _note_ On Indian antiquities, 200, _note_. On the Toltec migration, 268. On Nezahualcoyotl’s advice to his son, 212. His character of Nezahualcoyotl, 213. On the Lady of Tula, 215, _note_. On Nezahualpilli’s punishment of his wife, 216, _note_, iv. 281. Account of, and of his writings, i. 220. On Montezuma’s conversion, iii. 14, _note_. On the massacre by Alvarado, 90, _note_. On a statue of the Sun, 193, _note_. Authority for Tecocol, 268, _note_, 269, _note_. Etymology of the name of, 269, _note_. On headquarters at Tezcuco, iii. 281, _note_. On Tangapan’s sister and her vision, 296, _note_. Termination of his works, iv. 13, _note_. On the rescue of Cortés by a Tlascalan chief, 43, _note_. On Nezahualcoyotl’s residence, 279. Iztaccihuatl, ii. 187, 223, 228, _note_, 229, iii. 259. Iztacs, destruction of idols by, iv. 192, _note_. Iztapalapan, ii. 242. Gardens of, 243, iii. 284. Sack of, 285. Sandoval’s expedition against, 367, iv. 3. See _Cuitlahua_.