farther until the supports from the Eleventh and Twelfth Corps closed up on Birney's right and left.

The considerable interval on the left, between Birney's and Williams' division, of Slocum's corps, yet remaining unoccupied, and, suffering from a galling fire of musketry in that direction, I was compelled reluctantly to draw largely upon my reserves (Whipple) to enable me to connect on the left with Slocum. Barlow's brigade (of the Eleventh Corps) having got into position on the right, I was again in readiness for a farther advance, which was gallantly maintained by the sharpshooters, supported by the Twentieth Indiana and Fifth Michigan.

From this advance, 300 prisoners were soon reported to me, besides nearly 100 previously captured at the foundry by the sharpshooters. Hayman's brigade soon gained the road, supported by Graham and Ward, the latter keeping up communication on the right and rear, at the foundry. The road gained, Randolph's battery was advanced, and poured a destructive fire on the retreating column of the enemy. The movement was successfully completed.

Brigadier-General Pleasonton, with three regiments of cavalry (the Sixth New York, and Eighth and Seventeenth Pennsylvania) and Martin's battery of horse artillery, had already reported to me, and was moving over the hill through the woods toward the foundry, but not deeming it quite time for the effective employment of cavalry in the attack, in compliance with my suggestion, General Pleasonton returned to the opening near Scott's Run, formed his command, and waited until the way could be cleared for his operations.

Returning to the front, I found every indication that looked to a complete success as soon as my advance could be supported. The resistance of McLaw's division had almost ceased, and although our scouts reported a considerable force on the right and in front, it was evident that in few minutes five or six regiments would be cut off and fall into our hands. Regarding the moment opportune for the advance of General Pleasonton, with his cavalry and horse battery, I was about to dispatch a staff officer to bring him forward when it was reported to me that the Eleventh Corps had yield the right flank of the army to the enemy, who was advancing rapidly, and, indeed, was already in my rear. I confess I did not credit this statement until an aide-de-camp of General Warren, of General Hooker's staff, confirmed the report, and asked for a regiment of cavalry to check the movement. The Eighth Pennsylvania Cavalry was immediately sent by General Pleasonton, and brilliantly was the service performed, although with fearful loss. I had only time to dispatch staff officers to recall Birney and Whipple, when the enemy's scouts and some dragoons disclosed themselves as I rode toward the bridge across Scott's Run for the purpose of making disposition to meet and arrest this disaster. Meeting General Pleasonton, we hastened to make the best available disposition to attack Jackson's columns on their right flank.

I confided to Pleasonton the direction of the artillery-three batteries of my reserve-Clark's, Lewis', and Turnbull's, and his own horse battery. The only supports at hand comprised two small regiments of cavalry (Sixth New York and Seventeenth Pennsylvania) and one regiment of infantry (One hundred and tenth Pennsylvania, of Whipple's division). Time was everything. The fugitives of the Eleventh Corps swarmed from the woods and swept frantically over the cleared fields, in which my artillery was parked. The exulting enemy at their heels mingled yells with their volleys, and in the confusion which followed it seemed as if cannon and caissons, dragoons, cannoneers, and infantry