the tide of battle turned. Resolved to make one more final and desperate struggle for the mastery, Santa Anna had already ordered up his reserves, and his batteries redoubled their fire. The reinforcements marched up the ravine in front of the original line of battle, as the Americans were advancing, and formed at the base of the mountains, in connection with the column which had retreated. Against so powerful an host that little phalanx could not have been expected to prevail. Borne down before this overwhelming array which came so unexpectedly upon them, the infantry retired down the smaller ravines to the road. The lancers followed close upon them, slaughtering indiscriminately those who lay helpless beneath their horses' hoofs, those who were willing to surrender, and those who died with a note of defiance on their lips. Colonels Hardin and McKee, and Lieutenant Colonel Clay, were among the slain. Lieutenant Colonel Clay was not mortally wounded, and his men endeavored to carry him from the ground. Seeing so many falling around him, he begged to be laid down upon the field, where he died fighting bravely to the last. A prompt fire from Washington's battery upon the lancers, as they attempted to follow the American infantry into the road, put an end to the pursuit.
Meanwhile Lieutenant O'Brien had never ceased his fire. Two horses were shot under him, and a second time were all his cannoneers cut down. The enemy seemed goaded to desperation, and continued to press forward. Still he remained firmly by his guns, and never left them until the Mexicans were at their muzzles. Both pieces were captured and taken from the field. The crisis of the action had arrived. The centre of the American line was almost forced. But
