although the waters of the lake have evidently shrunken since the days of the conquest, it is not probable that it was more than three or four feet deeper than at present.[1] The distance to be traversed from Tezcoco to the capital was about twelve miles, and the subsequent service was to be rendered in the neighborhood of the causeways, and under the protection of the walls of the city.
The Indian allies from Tlascala came up in force at the appointed time. These fifty thousand well equipped men were led by Xicotencatl, who, as the expedition was about to set forth by land and water for the final attack, seems to have been seized with a sudden panic, and deserted his standard with a number of followers. There was no hope for conquest without the alliance and loyal support of the Tlascalans. The decision of Cortéz upon the occurrence of this dastardly act of a man in whose faith he had religiously confided, although he knew he was not very friendly to the Spaniards, was prompt and terribly severe. A chosen band was directed to follow the fugitive even to the walls of Tlascala. There, the deserter was arrested, brought back to Tezcoco, and hanged on a lofty gallows in the great square of that city. This man, says Prescott, "was the only Tlascalan who swerved from his loyalty to the Spaniards."
All being now prepared, Cortéz planned his attack. It will be recollected that the city of Mexico rose, like Venice, from the bosom of the placid waters, and that its communication with the main land was kept up by the great causeways which were described in the earlier portion of this narrative. The object of the conqueror, therefore, was to shut up the capital, and cut off all access to the country by an efficient blockade of the lake, with his brigantines, and of the land with his infantry and cavalry. Accordingly he distributed his forces into three bodies or separate camps. The first of these, under Pedro de Alvarado, consisting of thirty horse, one hundred and sixty-eight Spanish infantry, and twenty-five thousand Tlascalans, was to command the causeway of Tacuba. The second division, of equal magnitude, under Olid, was to be posted at Cojohuacan, so as to command the causeways that led eastwardly into the city. The third equal corps of the Spanish army was entrusted to Sandoval, but its Indian force was to be drawn from native allies at Chalco. Alvarado and Olid were to proceed
- ↑ The writer sounded the lake in the channel from Mexico to Tezcoco in 1842, and did not find more than 2½ feet in the deepest path. The Indians, at present, wade over all parts of the lake.
