essary.

"Use in this concentration the railroad, 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 and
attacking him wherever found; following 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
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 cavalry now en route from
Washington via Rockville may be taken into account.

"There are now on the way to join you three other brigades of the
best of 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, as 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 recurrences of these
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.

"Very respectfully,
"U. S. GRANT, Lieut.-General."

"Major-General D. HUNTER,
"Commanding Department of West Virginia."

When I had read the letter addressed to Hunter, General Grant said I
would be expected to report directly to him, as Hunter had asked that
day to be wholly relieved, not from any chagrin at my assignment to
the control of the active forces of his command, but because he
thought that his fitness for the position he was filling was
distrusted by General Halleck, and he had no wish to cause
embarrassment by remaining where he could but remove me one degree
from the headquarters of the army. Th