O.R.--SERIES I--VOLUME XXVII/1 [S# 43] -- Gettysburg Campaign
No. 1. -- Report of Maj. Gen. Henry W. Halleck, General-in-Chief, U. S. Army,
including operations in Southeastern Virginia and West Virginia.
pp.16-17
On the morning of the 4th, the enemy apparently occupied a new line in front of our left, but in reality his army had commenced its retreat, carrying off a part of his wounded. His lines, however, were not entirely evacuated until the morning of the 5th, when the cavalry and the Sixth Corps were sent in pursuit.
The days of the 5th and 6th were employed by General Meade in succoring the wounded and burying the dead left on the battle-field. He then started in pursuit of Lee by a flank movement upon Middletown. In the meantime General French had reoccupied Harper's Ferry, destroyed the enemy's pontoon train at Williamsport and Falling Waters, and captured its guards.