Nopaltzin wandered for some time from place to place, seemingly making it his object rather to search for an inhabited country than to take possession of an uninhabited one. At first his efforts met with no success, notwithstanding he ascended several high mountains for the purpose of seeing afar off. At last he came to Tlalamoztoc, whence his view extended over the country toward Tlazalan, and Culhuacan valley,[V-11] and Chapultepec, on the other side of the lake; throughout this region smoke arose in various places, denoting the presence of human inhabitants. Without loss of time, the prince returned to his father with the news of his discovery, passing the ruined city of Teotihuacan on his way. Xolotl had in the meantime visited the large Toltec city of Cuhuac (Culhuacan?), and had also received information of Toltec settlements on the coast and in the interior. A consultation was held, and it was decided that Tultitlan was the most eligible site for a capital. Accordingly Xolotl left Xoloc in the care of a governor and proceeded to that region and there founded Tenayocan opposite Tezcuco, on the other side of the lake.[V-12]
Brasseur's version of these events is somewhat different. He does not mention Xolotl's expedition to the hill of Atonan, though he does not omit to relate that Toltec settlements were described from that elevation by the reconnoitering parties sent out from the Chichimec camp at Lake Xaltocan; neither does he in any way refer to Nopaltzin's journey, at his father's command, to Tlalamoztoc. The reason of this difference is that according to Brasseur's version Nopaltzin was not the son of Xolotl, the first Chichimec emperor but of Amacui, one of six great chiefs, who were the first to follow in the successful invaders' wake, this they did not do, however, until after Xolotl had established himself at Tenayocan.[V-13] It seems that this Amacui has been confounded throughout with Xolotl by the majority of the Spanish chroniclers; in their version of the events which followed the founding of Tenayocan, during a period of nearly two hundred years, the deeds of the former are all ascribed to the latter, or at least the narrative is continued without any break, and no mention is made of any change of kings.[V-14]