After some weeks' stay at Tezcuco, the news came that the ships were all completed, and ready to be carried down; and two hundred foot and fifteen horse, under the command of Sandoval, were sent to escort them. But scarcely had he reached the frontier of Tlascala than he saw a vast procession advancing. The ships had already been put together, and tried on a lake among the hills; and were now being brought down in pieces by an immense number of porters, with a great military escort. Sandoval sent the larger portion of the Indian escort home, but kept twenty thousand of the best warriors. After four days of painful labor, the host of porters and fighting men reached Tezcuco. It was, indeed, an immense undertaking that had been accomplished; for the whole of the wood and iron work, of thirteen ships, had to be carried for upwards of sixty miles, over a difficult and mountainous country. A few days later, Cortez took half of his Spanish force and the whole of his allies, and started on an expedition to reconnoiter the capital, and to punish some of the towns which had returned insolent answers in reply to his summons. The town of Xaltocan, standing on an island, was first attacked. The dike leading to it was found to be cut through; and the Spaniards, for a time, suffered greatly. They found a ford, however; reached the town, and put all who resisted to the sword. Three other towns, which had been deserted by their inhabitants, were occupied and sacked. They then marched against Tlacopan and, after a battle outside the town, occupied the suburbs. Another hot fight was necessary before the town was fully taken. Here the Spaniards halted for some days, fighting almost daily with the Aztecs. In one encounter, Cortez allowed himself to be decoyed on to the great causeway, upon which he had before suffered such disaster. When he was halfway across the Aztecs turned, reinforcements arrived from the city, swarms of canoes attacked the Spaniards in flank; and it was only after desperate fighting, and some loss, that they regained the mainland. Having accomplished their object, the force returned to Tezcuco, greatly harassed on the march by the enemy. Other expeditions were undertaken. During these events the work of putting together the vessels was continued and, to the great satisfaction of the Spaniards, news reached them from the coast of the arrival of three ships, with reinforcements: two hundred men, seventy or eighty horses, arms, and ammunition. When these reached Tezcuco, Cortez felt confident that he should now be able to overcome all opposition. On the fifth of April he again started on an expedition. Passing through some deep gorges, he attempted to carry a mountain fortress; but was repulsed, with loss, from the volleys of stones and rocks rolled down upon the assailants.