Organization of the Army of the Potomac, Dec 31, 1862
FIFTH ARMY CORPS. Maj. Gen. GEORGE G. MEADE.
THIRD DIVISION. Brig. Gen. ANDREW A. HUMPHREYS.
First Brigade. Brig. Gen. ERASTUS B. TYLER.
91st Pennsylvania, Col. E. M. Gregory.
126th Pennsylvania, Lieut. Col. D. W. Rowe.
129th Pennsylvania, Lieut. Col. W. H. Armstrong.
134th Pennsylvania, Lieut. Col. E. O'Brien
[Official Records series 1 volume 21 at page 931]