these measurements, on account of the extent of the city from the great temple to the commencement of the causeways.  About the middle of the southern causeway called that of Iztapalapa, another causeway branched off obliquely to the south-east, to the town of Cojohuacan; and at the place where these two causeways united stood the town of Xoloc, partly on the sides of the causeways, but chiefly in the water intersected by canals and ditches.  Besides these three grand causeways for communicating with the land, there was a smaller mound about two miles south from the causeway of Tacuba, from a town named Chapoltepec, along which the aqueduct, or pipes, for supplying Mexico with fresh water was carried; but this appears to have been too narrow for allowing any passage, at least the Spaniards do not seem to have availed themselves of it, in their long and arduous endeavours to force their way into Mexico.  Near the south-west angle of the salt lake of Mexico, it communicated by a narrow neck or strait with the fresh water lake of Chalco; and at their junction a mound or causeway had been constructed across, to prevent the admixture of the salt and fresh lakes, having a town called Mexicaltzinco at the eastern extremity of this mound.  Iztapalapa stood in the western end of the peninsula, between the lakes of Mexico and Chalco, but on the borders and in the waters of the former.  The whole fertile vale of Mexico or Anahuac, around these two lakes, and some others to the north of the great lake, was thickly planted with cities, towns, and villages, and highly cultivated, containing and giving subsistence to a prodigious population.  The extent of this extraordinary valley, elevated nearly 8000 feet above the level of the sea, is about 50 miles from north to south, and forty miles from east to west; being surrounded on every side by ridges of lofty mountains, some of them perpetually covered with snow, and rising to about 10,000 feet in perpendicular elevation above the ocean.”

When Cortes brought out his fleet of brigantines upon the lake, he went in the first place to attack an insular rock close beside Mexico, on which a vast number of the inhabitants of that city and other places in the neighbourhood had taken shelter.  Immediately on perceiving his intentions, their whole force collected from every part of the lake, and proceeded against him in not less than 4000 large canoes full of warriors.  On perceiving this immense number of boats coming to attack him, Cortes withdrew with his brigantines into an open part of the lake, ordering his captains to wait patiently for a breeze of wind which then began to blow.  As the enemy supposed that this movement proceeded from fear, they immediately closed up around the flotilla with shouts of triumph.  The wind now sprung up, and the whole fleet made sail through the throng of canoes, plying their oars at the same time, and run down and overset great numbers of the Mexican canoes, compelling all the rest to fly for