After a period of four centuries, the Toltecs, who had extended their sway over the remotest borders of Anahuac,[23] having been greatly reduced, it is said, by famine, pestilence, and unsuccessful wars, disappeared from the land as silently and mysteriously as they had entered it. A few of them still lingered behind, but much the greater number, probably, spread over the region of Central America and the neighboring isles; and the traveller now speculates on the majestic ruins of Mitla and Palenque, as possibly the work of this extraordinary people.[24][25] After the lapse of another hundred years, a numerous and rude tribe, called the Chichimecs, entered the deserted country from the regions of the far Northwest. They were speedily followed by other races, of higher civilization, perhaps of the same family with the Toltecs, whose language they appear to have spoken. The most noted of these were the Aztecs or Mexicans, and the Acolhuans. The latter, better known in later times by the name of Tezcucans, from their capital, Tezcuco,[26] on the eastern border of the Mexican lake, were peculiarly fitted, by their comparatively mild religion and manners, for receiving the tincture of civilization which could be derived from the few Toltecs that still remained in the country.[27] This, in their turn, they communicated to the barbarous Chichimecs, a large portion of whom became amalgamated with the new settlers as one nation.[28] Availing themselves of the strength derived, not only from this increase of numbers, but from their own superior refinement, the Acolhuans gradually stretched their empire over the ruder tribes in the north; while their capital was filled with a numerous population, busily employed in many of the more useful and even elegant arts of a civilized community. In this palmy state, they were suddenly assaulted by a warlike neighbor, the Tepanecs, their own kindred, and inhabitants of the same valley as themselves. Their provinces were overrun, their armies beaten, their king assassinated, and the flourishing city of Tezcuco became the prize of the victor. From this abject condition the uncommon abilities of the young prince, Nezahualcoyotl, the rightful heir to the crown, backed by the efficient aid of his Mexican allies, at length redeemed the state, and opened to it a new career of prosperity, even more brilliant than the former.[29]