At this perilous moment the rattle of musketry was drowned by a tremendous roar pf cannon in the direction of the pass. The Mexicans under Villamil had approached within range, and Captain Washington, who had sworn to hold the pass against any odds, was keeping his word. The gunners had been wild with ardor and suspense all morning; they were now gratified, and, though three guns had been taken from the battery, they poured such a murderous fire upon Villamil’s column as it approached through the narrow pass that, after wavering a moment, it scattered, and most of the men sought refuge in the ravines. The moment they broke the Second Illinoisans, who had been stationed at the pass, eagerly followed their colonel, Hardin, to the plateau, to share the dangers of their comrades. Almost as soon McKee’s Kentuckians and Bragg’s battery came plunging through the gullies on the west of the pass and joined them; while Sherman’s guns were speedily brought up from the rear. Thus the First Illinoisans were saved, and grape and canister mowed down the Mexican masses at the foot of the mountain. Still, the light infantry under Ampudia were pressing on by the left to the rear of Wool’s position. In half an hour the pass might have been turned. Most providentially at that moment Taylor arrived with Davis’ Mississippi riflemen and May’s dragoons. The former barely stopped an instant for the men to fill their canteens, then hastened to the field. Boiling with rage, Davis called on the Indiana volunteers to form “behind that wall,” pointing to his men, and advance against their enemy. Their colonel, Bowles, the tears streaming down his face, finding all his appeals fruitless, seized a musket and joined the Mississippians as a private. Time could not be lost; Ampudia was close upon them; Davis formed and advanced with steady tread against a body more than five times his strength. A rain of balls poured upon the Mississippians, but no man pulled a trigger till sure of his mark. Then those deadly rifles blazed and stunned the Mexican advance. A ravine separated them from the enemy; Davis gave the word, and, with a cheer, down they rushed and up the other side; then forming hastily, with one awful volley they shattered the Mexican head and drove them back to cover.