oad, if by so doing time can be saved. From
Harper's Ferry, if it is found that the enemy has moved north of the
Potomac in large force, push north, following him and attacking him
wherever found; follow him, if driven south of the Potomac, as long as
it is safe to do so. If it is ascertained that the enemy has but a
small force north of the Potomac, then push south with the main force,
detaching under a competent commander, a sufficient force to look after
the raiders, and drive them to their homes. In detaching such a force,
the brigade of the cavalry now en route from Washington via Rockville
may be taken into account.

"There are now on their way to join you three other brigades of the best
cavalry, numbering at least five thousand men and horses. These will be
instructed, in the absence of further orders, to join you by the south
side of the Potomac. One brigade will probably start to-morrow. In
pushing up the Shenandoah Valley, where it is expected you will have to
go first or last, it is desirable that nothing should be left to invite
the enemy to return. Take all provisions, forage, and stock wanted for
the use of your command; such as cannot be consumed, destroy. It is not
desirable that the buildings should be destroyed--they should rather be
protected; but the people should be informed that, so long as an army
can subsist among them, recurrence of theses raids must be expected, and
we are determined to stop them at all hazards.

"Bear in mind, the object is to drive the enemy south; and to do this
you want to keep him always in sight. Be guided in your course by the
course he takes.

"Make your own arrangements for supplies of all kinds, giving regular
vouchers for such as may be taken from loyal citizens in the country
through which you march.

"U. S. GRANT, Lieutenant-General.
"MAJOR-GENERAL D. HUNTER."

The troops were immediately put in motion, and the advance reached
Halltown that night.

General Hunter having, in our conversation, expressed a willingness to
be relieved from command, I telegraphed to have General Sheridan, then
at Washington, sent to Harper's Ferry by the morning train, with orders
to take general command of all the troops in the field, and to call on
General Hunter at Monocacy, who would turn over to him my letter of
instructions. I remained at Monocacy until General Sheridan arrived, on
the morning of the 6th, and, after a conference with him in relation to
military