HEADQUARTERS ARMY OF THE POTOMAC, July 15, 1863-8. 45 a. m.

Major-General NEWTON,
Commanding First Army Corps:

The major-general commanding directs me to say that orders have been sent to General Sedgwick to move forward your corps, which should follow in pursuit of the enemy immediately.

A. A. HUMPHREYS,

Major-General, and Chief of Staff.

HEADQUARTERS Army of the Potomac, Sandy Hook, July 15, 1863-1 p. m.

Captain CLAPP,
Adjutant Engineer Brigade, Washington:

General Benhan was ordered by General Humphreys, chief of staff, to send up at once, by the canal, all the serviceable bridge stuff you had to Berlin. Has any stared yet?

G. J. WARREN,

Brigadier General Vols., Chief Engineer, Army of the Potomac.

WASHINGTON, July 15, 1863.

General A. A. HUMPRHEYS,

Chief of Staff:

One raft of fifty-two boats started from here for Berlin at 9 a. m. ; another, of thirty-two boats, will start at 12 m., to go by the canal. The officer in charge has order to report to you by wire.

CHANNING CLAPP,

Assistant Adjutant-General.

[Indorsement.]

Send this to General Warren, Sandy Hook.

A. A. HUMPHREYS,

Chief of Staff.

SANDY HOOK, July 15, 1863-2 p. m.

General HUMPHREYS:

The bridge over the Potomac will now let troops pass into the Shenandoah Valley. It will take us till morning to repair the bridge over the Shenandoah. We are at it. I am patching up boats, so as to et, if I can, the number of boats necessary for the bridge at Berlin, even if the boats do not arrive from Washington by to-morrow night. The wheelbarrows were to be here at noon to-day. If they come, the canal will be done to-morrow evening. The canal is dry above the dam, 1 mile above Harper's Ferry, owing to a break in the aqueduct at the mouth of the Monocacy.

G. K. WARREN,

Brigadier-General.