To detach troops under the circumstances was not agreeable, and many officers objected, but Cortés considered that it would be far more dangerous to Spanish prestige and prospects to encourage such hostile movements by a passive demeanor. “It was now more necessary than ever,” he writes, “to exhibit prowess and spirit, so as to hide our weakness both from friends and foes.” Andrés de Tápia was accordingly despatched with ten horse and eighty foot, together with a considerable force of allies.39 In order to calm the many remonstrances against the expedition, he was instructed to return within ten days. Tápia found the enemy awaiting him in large force near a hamlet not far from Malinalco, and at once prepared to attack, assisted by the Quauhnahuacs. The ground being level, the horses proved of great service, and the hostile army was presently in flight toward Malinalco. This place was strongly situated on a height, well supplied with water, so that Tápia considered it useless to attempt an assault, much less a siege when so short a term had been allowed him, and he accordingly returned.
The complaint from Quauhnahuac was followed by a deeper wail from Toluca and adjoining Otomí settlements in the mountain region west of the lake. The Matlalzincas, devoted adherents of Quauhtemotzin, had been induced to openly declare for him and to invade their districts, preparatory to advancing against the Spaniards. This intention had been already vauntingly proclaimed by the Aztecs, and since the Matlaltzincas were both powerful and warlike, the necessity for prompt measures became even more apparent in this case. The tried Sandoval was intrusted with the expedition, composed of eighteen cavalry, one hundred infantry, and a large force of allies chiefly Otomís, which soon grew to about seventy thousand. After a quick march he came to the smoking ruins of some settlements and startled into flight a band of marauders, who left behind them a quantity of plunder and provisions, including some tender children still roasting on the spit. He pursued the raiders, and after crossing a river40 came upon a larger force, which turned as he approached, to seek safety within the town of Matlaltzinco, over