GREGG (HEADQUARTERS GUARD--Company A, 1st Ohio.) _First Brigade_ .-- Colonel J.B.McINTOSH 1st New Jersey, Major M.H.Beaumont 1st Pennsylvania, Colonel John P.Taylor 3d Pennsylvania, Lieut.-Colonel Edward S.Jones 1st Maryland, Lieut.-Colonel James M.Deems 1st Massachusetts at Headquarters Sixth Corps.
_Second Brigade_.*--Colonel PENNOCK HUEY 2d New York, 4th New York, 8th Pennsylvania, 6th Ohio.
[* Not engaged.] _Third Brigade_ .-- Colonel J.I.GREGG 1st Maine, Colonel Charles H.Smith 10th New York, Major W.A.Avery 4th Pennsylvania, Lieut.-Colonel W.E.Doster 16th Pennsylvania, Lieut.-Colonel John K.Robison THIRD DIVISION.
BRIGADIER-GENERAL JUDSON KILPATRICK (HEADQUARTER GUARD--Company C, 1st Ohio.) _First Brigade_ .-- (1) Brigadier-General E.J.

FARNSWORTH; (2) Colonel N.P.

RICHMOND 5th New York, Major John Hammond 18th Pennsylvania, Lieut.-Colonel William P.Brinton 1st Vermont, Colonel Edward D.Sawyer 1st West Virginia, Colonel N.P.

Richmond _Second Brigade_ .-- Brigadier-General GEORGE A.CUSTER 1st Michigan, Colonel Charles H.Town 5th Michigan, Colonel Russell A.Alger 6th Michigan, Colonel George Gray 7th Michigan, Colonel Wm.

D.Mann HORSE ARTILLERY.* [* A section of a battery attached to the Purnell Legion was with Gregg on the 3d.] _First Brigade_ .-- Captain JOHN M.ROBERTSON Batteries B and L, 2d United States, Lieutenant Edw.