(Thomas' and Scales') were moved from the right, and Mahone was ordered to move before light to Shady Grove; but during the night it was discovered that the movement to our left was a feint, and that there was a real movement of the enemy towards our right.
Before daybreak on the morning of the 12th, Wilcox's brigades were returned to him, and at dawn, Mahone's division was moved to the right, leaving Wright's brigade of that division to cover the crossing of the Po on Field's left. On this morning, the enemy made a very heavy attack on Ewell's front, and broke the line where it was occupied by Johnson's division. A portion of the attacking force swept along Johnson's line to Wilcox's left, and was checked by a prompt movement on the part of Brigadier-General Lane, who was on that flank. As soon as the tiring was heard, General Wilcox sent Thomas' and Scales' brigades to Lane's assistance, and they arrived just as Lane's brigade had repulsed this body of the enemy, and they pursued it for a short distance. As soon as Mahone's division arrived from the left, Perrin's and Harris' brigades of that division, and subsequently, McGowan's brigade of Wilcox's division, were sent to General Ewell's assistance, and were carried into action under his orders. Brigadier-General Perrin was killed, and Brigadier-General McGowan severely wounded, while gallantly leading their respective brigades into action; and all the brigades sent to Ewell's assistance suffered severely.
Subsequently, on the same day, under orders from General Lee, Lane's brigade of Wilcox's division, and Mahone's own brigade (under Colonel Weisiger), were thrown to the front, for the purpose of moving to the left, and attacking the flank of the column of the enemy which had broken Ewell's line, to relieve the pressure on him, and, if possible, recover the part of the line which, had been lost. Lane's brigade commenced the movement and had not proceeded far, when it encountered and attacked, in a piece of woods in front of my line, the 9th corps, under Burnside, moving up to attack a salient on my front. Lane captured over three hundred prisoners, and three
