PITTSBURGH, June 14, 1863.

General GEORGE W. McCOOK,

Steubenville, Ohio:

General [Halleck] telegraphs:

Lee's army is in motion toward the Shenandoah Valley.

Please get your men together, ready for the defense of Wheeling or elsewhere.

W. T. H. BROOKS,

Major-General.

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COLUMBUS, OHIO, June 14, 1863.

Bring. General JACOB D. COX:

Copy of dispatch just received from Governor Peirpoint, at Wheeling:

Enemy at Martinsburg to-day at 1 o'clock, reported in large force, having Milroy in their rear, with force accompanying him in front. There is also a rebel force on the Kanawha, south of Charleston, which will doubtless move in he direction of the Ohio River immediately. There is little in West Virginia, excepting militia, to meet it.

DAVID TOD,

Governor.

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GENERAL PLEASONTON'S HEADQUARTERS,

June 15, 1863-12. 56 a. m.

(Copy received, War Department, 1 a. m.)

General HOOKER,

Dumfries:

My scouts from Chester and Ashby's Gaps report the rebel General Stuart, with 15, 000 cavalry, at Upperville. The people, in that vicinity, both white and black, state that Longstreet is supporting Stuart with 30, 000 men. Heave firing in the direction of Winchester all day long. Stuart was moving in a direction to strike the Potomac between Leesburg and Harper's Ferry. He was moving slowly. Two other corps, 30, 000 men each, under A. P. Hill and Ewell, are still south of the Rappahannock; Hill to cross in our rear at Banks' and United States Fords, Ewell at Sulphur Springs. This last comes from a prisoner.

A. PLEASONTON,

Brigadier-General, Commanding.

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HEADQUARTERS STAHEL'S CAVALRY DIVISION, Fairfax Court-House, Va.,
June 15, 1863-2 a. m.

Major-General HOOKER,

Commanding Army of the Potomac:

I have the honor to inform you that, at the request of General Howard, I have sent a strong scouting party to Aldie and that vicinity, with orders that the officer shall report on his return to General Howard.

Respectfully,

JUL. STAHEL,

Major-General.