Page:The Conquest of Mexico Volume 1.djvu/401



HE ancient city of Mexico covered the same spot occupied by the modern capital. The great causeways touched it in the same points; the streets ran in much the same direction, nearly from north to south, and from east to west; the cathedral in the plaza mayor stands on the same ground that was covered by the temple of the Aztec war-god; and the four principal quarters of the town are still known among the Indians by their ancient names. Yet an Aztec of the days of Montezuma, could lie behold the modern metropolis, which has risen with such phœnix-like splendour from the ashes of the old, would not recognise its site as that of his own Tenochtitlan. For the latter was encompassed by the salt floods of Tezcuco, which flowed in ample canals through every part of the city; while the Mexico of our day stands high and dry on the mainland, nearly a league distant, at its centre, from the water. The cause of this apparent change in its position is the diminution of the lake, which, from the rapidity of evaporation in these elevated regions, had become perceptible before the Conquest, but which has since been greatly accelerated by artificial causes.1

The average level of the Tezcucan lake, at the present day, is but four feet lower than the great square of Mexico.2 It is considerably lower than the other great basins of water which are found in the valley. In the heavy swell sometimes caused by long and excessive rains, these latter reservoirs anciently overflowed into the Tezcuco, which, rising with the accumulated volume of waters, burst through the dikes, and, pouring into the streets of the capital, buried the lower part of the buildings under a deluge. This was comparatively a light