However, his advice on this matter was not followed, for the Mexicans were a home-loving race, and could not easily reconcile themselves to parting with their families, a fact which afterwards had a fatal influence on their hopes of success. Unable to persuade them in this, Roger caused them to arrange for the constant supply of fresh provisions, to be brought at night by way of the water, and set guards on the enormous tanks which held the city's supply of fluid. That done, he turned to the training of his two special bands, the one wielding long lances, tipped with sharp spikes made from the Spanish armour and arms, while the crossbow men carried a weapon which, if not as good as the one which he and Tamba used, was almost so, and could be relied on to do much execution. "We will divide the lances up into three lots," he said to Teotlili, as that noble was one day inspecting the band, "for I think that the Spaniards may attack in three columns along the three viaducts. We will appoint their officers and give them a little practice, for one band can be pitted against the other." At his direction the men reversed their arms, and lashed a piece of cotton to the butt end of the stout poles which held the lance head, padding the cotton with some loose material. Then one band was set to enter the city, while another opposed them. Roger taught them how to stand steady, to await attack, and how to make the most of their numbers, the front rank kneeling, while the rear rank, standing only a pace behind, stood upright, their lances protecting their comrades who knelt. At a shout the whole party would dart forward and take up a new position, or would retire slowly, facing the supposed enemy. But there was more to be seen, and Teotlili and the king, who was more than energetic in these days of preparation, and who had come to see how the bands were faring, were delighted at the next movement. "We have no horses, but we can imagine them," said Roger, with a smile. "The enemy will rush forward without arms, and my men will send a force forward to break up the supposed horsemen." He whistled to the men who had been sent along the causeway, while a shout set those with the lances in motion. They ran forward to meet the supposed horsemen, and took up a position as formerly. Then some forty who stood behind them leaped over the shoulders of those who were kneeling and dashed to the front. Arrived within a few feet of the supposed horsemen, they shouted, waved their arms, and flung themselves on the ground. "That is as far as we can train them without horses," said Roger; "but they know what is required. I have given them instructions to wave and shout, for horses are easily frightened. Then they will escape the lances by flinging themselves on the ground, while they need not fear the horses stamping on them. It remains to be seen how they will manage to deal with the enemy."