But a life of such incessant toil and vigilance was almost too severe even for the stubborn constitutions of the Spaniards. “Through the long night,” exclaims Diaz, who served in Alvarado’s division, “we kept our dreary watch; neither wind, nor wet, nor cold availing anything. There we stood, smarting as we were from the wounds we had received in the fight of the preceding day.”[29] It was the rainy season, which continues in that country from July to September;[30] and the surface of the causeways, flooded by the storms, and broken up by the constant movement of such large bodies of men, was converted into a marsh, or rather quagmire, which added inconceivably to the distresses of the army. The troops under Cortés were scarcely in a better situation. But few of them could find shelter in the rude towers that garnished the works of Xoloc. The greater part were compelled to bivouac in the open air, exposed to all the inclemency of the weather. Every man, unless his wounds prevented it, was required by the camp regulations to sleep on his arms; and they were often roused from their hasty slumbers by the midnight call to battle. For Guatemozin, contrary to the usual practice of his countrymen, frequently selected the hours of darkness to aim a blow at the enemy. “In short,” exclaims the veteran soldier above quoted, “so unintermitting were our engagements, by day and by night, during the three months in which we lay before the capital, that to recount them all would but exhaust the reader’s patience, and make him fancy he was perusing the incredible feats of a knight-errant of romance.”[31] The Aztec emperor conducted his operations on a systematic plan, which showed some approach to military science. He not unfrequently made simultaneous attacks on the three several divisions of the Spaniards established on the causeways, and on the garrisons at their extremities. To accomplish this, he enforced the service not merely of his own militia of the capital, but of the great towns in the neighborhood, who all moved in concert, at the well-known signal of the beacon-fire, or of the huge drum struck by the priests on the summit of the temple. One of these general attacks, it was observed, whether from accident or design, took place on the eve of St. John the Baptist, the anniversary of the day on which the Spaniards made their second entry into the Mexican capital.[32]