put together and tried on the waters of Zahuapan; and which, after a successful experiment, they had taken to pieces again and borne in fragments to Tezcoco.
Early in the spring of 1521, Cortéz entrusted his garrison at Tezcoco to Sandoval, and, with three hundred and fifty Spaniards, and nearly all his Indian allies, departed on an expedition designed to reconnoitre the capital. He passed from his stronghold northwardly around the head of the lakes north of Tezcoco,—one of which is now called San Cristoval,—and took possession of the insular town of Xaltocan. Passing thence along the western edge of the vale of Anahuac or Mexico, he reached the city of Tacuba, west of the capital, with which so many disastrous recollections were connected on his first sad exit from the imperial city. During this expedition the troops of the conqueror were almost daily engaged in skirmishes with the guerilla forces of the Aztecs; yet, notwithstanding their constant annoyance and stout resistance, the Spaniards were invariably successful and even managed to secure some booty of trifling value. After a fortnight of rapid marching, fighting and reconnoitering, Cortéz and his men returned to Tezcoco. Here he was met by an embassy from the friendly Chalcans and pressed for a sufficient force to sustain them against the Mexicans, who despatched the warriors of certain neighboring and loyal strongholds to annoy the inhabitants of a town which had exhibited a desire to fraternize with the invading Spaniards. Indeed, the Aztecs saw the importance of maintaining the control of a point which commanded the most important avenue to their capital from the Atlantic coast. The wearied troops of Cortéz were in no plight to respond to the summons of the Chalcans at that moment, for their hurried foray and incessant conflicts with the enemy had made them anxious for the repose they might justly expect in Tezcoco. Nevertheless, Cortéz did not choose to rely upon his naval enterprise alone; but, conscious as he was of holding the main key of the land as well as water, he despatched, without delay, his trusty Sandoval with three hundred Spanish infantry and twenty horse to protect the town of Chalco and reduce the hostile fortifications in its vicinity. This duty he soon successfully performed. But the Aztecs renewed the assault on Chalco with a fleet of boats, and were again beaten off with the loss of a number of their nobles, who were delivered by the victors to Sandoval whom Cortéz had sent back to support the contested town as soon as the news of the fresh attack reached him.
