At the first sound Molineux moved his men back into the rifle-pits they had left an hour before, and Emory, ordering his corps to stand to arms, rode at once to the left of his line at the valley road to find out the meaning of this strange outbreak. Knowing that Molineux was near and ready, Emory drew from him two regiments, the 22d Iowa and the 3d Massachusetts, to support the artillery planted on the left to command the bridge. Hardly had this been done when the shells began to fall among the guns and to enfilade the lines of the infantry. What could this mean but the thing that had actually happened to Thoburn? Grover joined Emory, Crook came from Belle Grove, and Wright from his camp beyond Meadow Brook. The fugitives from Thoburn's unfortunate division went streaming by. Then suddenly from the left and rear came the startling rattle of the rifles that told of Gordon's attack on the exposed flank of Hayes and Kitching. While all eyes were directed toward Kershaw, Gordon, still further favored by the fog, the outcry, and the noise of the cannonade, was not perceived by the troops of Hayes and Kitching until the instant when his solid lines of battle, unheralded by a single skirmisher of his own, and unannounced by those set to watch against him, fell upon the ranks of Crook. He tried in vain to form on the road. Startled from their sleep by the surprise of their comrades on their right, and naturally shaken by the disordered rush of the fugitives through their ranks, his men, old soldiers and good soldiers as they were, gave way at the first onset, before the fire of Gordon had become heavy and almost without stopping to return it.