eneral Grant on the 20th
of August that I had purposely left everything in that direction open
to the enemy.

On the 22d the Confederates moved to Charlestown and pushed well up
to my position at Halltown. Here for the next three days they
skirmished with my videttes and infantry pickets, Emory and Cook
receiving the main attention; but finding that they could make no
impression, and judging it to be an auspicious time to intensify the
scare in the North, on the 25th of August Early despatched Fitzhugh
Lee's cavalry to Williamsport, and moved all the rest of his army but
Anderson's infantry and McCausland's cavalry to Kerneysville. This
same day there was sharp picket firing along the whole front of my
infantry line, arising, as afterward ascertained, from a heavy
demonstration by Anderson. During this firing I sent Torbert, with
Merritt's and Wilson's divisions, to Kerrteysville, whence he was to
proceed toward Leetown and learn what had become of Fitz. Lee.

About a mile from Leetown Torbert met a small force of Confederate
cavalry, and soon after encountering it, stumbled on Breckenridge's
corps of infantry on the march, apparently heading for Shepherdstown.
The surprise was mutual, for Torbert expected to meet only the
enemy's cavalry, while the Confederate infantry column was
anticipating an unobstructed march to the Potomac. Torbert attacked
with such vigor as at first to double up the head of Breckenridge's
corps and throw it into confusion, but when the Confederates realized
that they were confronted only by cavalry, Early brought up the whole
of the four infantry divisions engaged in his manoeuvre, and in a
sharp attack pushed Torbert rapidly back.

All the advantages which Torbert had gained by surprising the enemy
were nullified by this counter-attack, and he was obliged to withdraw
Wilson's division toward my right, to the neighborhood of Duffield's
Station, Merritt drawing back to the same point by way of the
Shepherdstown ford. Custer's brigade becoming isolated after the
fight while assisting the rear guard, was also obliged to retire,
which it did to Shepherdstown and there halted, picketing the river
to Antietam ford.

When Torbert reported to me the nature of his encounter, and that a
part of Early's infantry was marching to the north, while Fitzhugh
Lee's cavalry had gone toward Martinsburg, I thought that the
Confederate general meditated crossing his cavalry into Maryland, so
I sent Wilso