At the firing of a cannon the first slid gracefully into the water. Then came another gun and another launch; and so on, until, with the thirteenth gun, the thirteenth brigantine entered the water, and the first American-built navy was afloat. Now, amid a roar of artillery and musketry, the acclamations of tens of thousands of dusky spectators, and the sound of martial music, with the banner of Castile flying from every mast-head, and their own guns answering the glad salute from the shore, the fleet dropped down the canal, and spreading its white wings to a brisk breeze, stood proudly out over the broad waters of the lake.

It was a novel spectacle to the simple natives, and a glad one to the white conquerors; for, with the combined forces of an army and a navy opposed to it, they felt assured that the bloody priesthood of Tenochtitlan was destined to a speedy overthrow. So inspired were they by these feelings, that, led by their commander, the entire Christian army raised its voice in a grand Te Deum.

At this time, exclusive of their allies, the besieging army consisted of eight hundred and eighteen foot soldiers, and eighty-seven cavalry. For weapons they had one hundred and eighteen muskets and crossbows, three heavy iron guns, and fifteen falconets of brass, half a ton of powder, fifty thousand copper-headed arrows, and a thousand long Chinantla pikes, besides their swords and the lances of the cavaliers. To each of the brigantines was allotted a falconet, and three hundred of the troops were detailed to man the fleet. The remainder of the Spaniards, together with one hundred thousand warriors from Tlascala and other allied cities, all eager for the downfall of Tenochtitlan, the stronghold of the oppressor, were divided into three armies, commanded by Sandoval, Alvarado, and Olid.

By the end of May, everything being in readiness, these armies were dispatched to their stations at the ends of the three great causeways leading to the city, while Cortes took temporary command of the fleet. He set sail from Tezcuco; but before he reached Istapalapan the breeze failed, and his vessels lay becalmed. While thus helpless, they were approached by an immense flotilla of Aztec canoes and periaguas, sent out by Guatamotzin for their destruction. These came on boldly until within pistol shot of the drifting fleet, and then halted, irresolute as to how they should attack such monsters.

Just then, a light air springing up, the brigantines bore directly down on the gathered canoes, which greeted them with a dense, but ineffective, flight of arrows and stones. Gathering headway as they advanced, the vessels crashed into the massed flotilla with frightful effect, at the same time letting fly their falconets to right and left. The rippling waters were instantly covered with the wreckage of shattered canoes and struggling human forms. The few survivors fled, with all speed, back to their city, and thus ended the first naval engagement in American waters.

Continuing his way to the great dike, by which he had made his first entry into Tenochtitlan, Cortes assaulted and captured the fort of Xoloc, by which it was defended, midway between the mainland and the city. Here he planted his heavy guns, and this place he made his headquarters during the siege.

In the meantime Alvarado had succeeded, after a stubborn battle, in cutting the aqueduct by which fresh water reached the city from Chapultepec. He next attempted to gain possession of the fatal causeway of Tlacopan, but was driven back, with heavy losses, after several hours of fighting.

After a week spent in the comparative inactivity of perfecting the blockade, the Commander resolved upon a general assault on the city by the three armies. As Huetzin had no longer a separate command, he asked and obtained permission to devote himself to the especial destruction of the Aztec gods. For this purpose he carefully selected one hundred of his most valiant warriors, and attached himself to the division led by the General over the causeway of Iztapalapan.

Its several openings were guarded by strong barricades, behind which the enemy made resolute stands. By the aid of the brigantines, which attacked them on each side, these were successfully carried, one after another, and at length the conquerors trod once more the familiar streets of the city.

How different now was this reception from that of their first entry! Then, myriads of eager and welcoming spectators, men, women, and children, were gathered on the flower-roofed houses. Now, most of the women and children had been sent from the city, and the house-tops were thronged only with grim warriors, who showered down a continuous storm of arrows, darts, and great stones, that stretched many a bold Spaniard and swarthy Tlascalan in the dust.