An ancient Cakchiquel legend relates, moreover, that, according to the “ancient men,” there had been four Tulans: one in the east, one in the north, one in the west and one “where the god dwells.” This would obviously have been situated towards the south in order to accord with the general scheme. I cannot but think that this record testifies to the existence of an extremely ancient state which starting from one metropolis had gradually developed into four great Tullans, to one of which the four tecpans of Guatemala pertained. The fact that the Spaniards found the four nations living close together, with capitals or tecpans bearing Nahuatl names and in constant warfare with each other, seems to indicate the destruction of their own ancient metropolis or Tullan by their Mexican conquerors and the consequent disintegration of their former government.(40) The Mendoza Codex teaches us that when the Mexicans conquered a land they first burnt and utterly destroyed the teocallis situated in the heart of its central capital. They razed this to the ground, and carried off to their own metropolis the totemic images of the rulers of the tribe. The barbarous institution of human sacrifice, which was only practised to a great extent by the Mexicans when the necessity to obtain more plentiful food supplies for their rapidly increasing population forced them to become a nation of warriors and conquerors, seems indeed to have been adopted as a fear-inspiring, symbolical rite commemorating the conquest and destruction of an integral government. The victim, usually a chieftain taken prisoner in warfare and clad with his insignia and the raiment of his people, was stretched on the stone of sacrifice and, figuratively speaking, represented his country and its four quarters. The tearing out of his heart by the high-priest, armed with the tecpatl, the emblem of supreme authority, signified the destruction of the independent life of his tribe as much as did the burning of the teocalli, and of its capital. It would seem as though the horrible custom of annually sacrificing one or more representatives of each conquered tribe, had been adopted as a means of upholding the assumed authority, inspiring awe and terror and impressing the realization of conquest and utter subjection. It is known that sometimes a member of a conquered tribe voluntarily offered himself as a victim in order to release his people from their obligation, and thus earned for himself immortality.