Cortés now felt himself strong enough to put in execution the plans for recovering the capital, over which he had been brooding ever since the hour of his expulsion. He had greatly undervalued the resources of the Aztec monarchy. He was now aware, from bitter experience, that, to vanquish it, his own forces, and all he could hope to muster, would be incompetent, without a very extensive support from the Indians themselves. A large army would, moreover, require large supplies for its maintenance, and these could not be regularly obtained, during a protracted siege, without the friendly co-operation of the natives. On such support he might now safely calculate from Tlascala and the other Indian territories, whose warriors were so eager to serve under his banners. His past acquaintance with them had instructed him in their national character and system of war; while the natives who had fought under his command, if they had caught little of the Spanish tactics, had learned to act in concert with the white men and to obey him implicitly as their commander. This was a considerable improvement in such wild and disorderly levies, and greatly augmented the strength derived from numbers. Experience showed that in a future conflict with the capital it would not do to trust to the causeways, but that, to succeed, he must command the lake. He proposed, therefore, to build a number of vessels like those constructed under his orders in Montezuma’s time and afterwards destroyed by the inhabitants. For this he had still the services of the same experienced shipbuilder, Martin Lopez, who, as we have seen, had fortunately escaped the slaughter of the “Melancholy Night.” Cortés now sent this man to Tlascala, with orders to build thirteen brigantines, which might be taken to pieces and carried on the shoulders of the Indians to be launched on the waters of Lake Tezcuco. The sails, rigging, and iron-work were to be brought from Vera Cruz, where they had been stored since their removal from the dismantled ships. It was a bold conception, that of constructing a fleet to be transported across forest and mountain before it was launched on its destined waters! But it suited the daring genius of Cortés, who, with the co-operation of his stanch Tlascalan confederates, did not doubt his ability to carry it into execution.