July 11th was not characterized by any general engagement, except that General Fitz. Lee, now on the right towards Downsville, was compelled to retire upon the main body; and the main body having assumed a shorter line, with its left resting on the National road, just west of Hagerstown, Chambliss' brigade was sent to that flank and General Fitz. Lee's also. The enemy made no movement on Jones' front, embracing the Funkstown and Cavetown roads.
On the 12th firing began early, and the enemy having advanced on several roads on Hagerstown, our cavalry forces retired without serious resistance, and massed on the left of the main body, reaching with heavy outposts the Conococheague on the National road. The infantry having already had time to entrench themselves, it was no longer desirable to defer the enemy's attack.
The 13th was spent in reconnoitring on the left—Rodes' division occupying the extreme left of our infantry, very near Hagerstown, a little north of the National road. Cavalry pickets were extended beyond the railroad leading to Chambersburg, and everything put in readiness to resist the enemy's attack.
The situation of our communications south of the Potomac caused the Commanding-General to desire more cavalry on that side, and accordingly Brigadier-General Jones' brigade (one of whose regiments, Twelfth Virginia cavalry, had been left in Jefferson) was detached and sent to cover our communication with Winchester.
The cavalry on the left consisted now of Fitz. Lee's, W. H. F. Lee's, Baker's, and Robertson's brigades—the latter being a mere handful.
On the 13th skirmishing continued at intervals; but it appeared that the enemy, instead of attacking, was entrenching himself in our front, and the Commanding-General determined to cross the Potomac. The night of the 13th was chosen for this move, and the arduous and difficult task of bringing up the rear was, as usual, assigned to the cavalry. Just before night, which was unusually rainy, the cavalry was disposed from right to left to occupy, dismounted, the trenches of the infantry at dark—Fitz. Lee's brigade holding the line of Longstreet's corps, Baker's of Hill's corps, and the remainder of Ewell's corps.
A pontoon bridge had been constructed at Falling Waters, some miles below Williamsport, where Longstreet's and Hill's corps were to cross, and Ewell's corps was to ford the river at Williamsport
