MARIETTA, OHIO, December 10, 1862-11.25 a.m.

Major General H. W. HALLECK,

General-in-Chief:

Your dispatch of yesterday, by mistake in telegraphing, was not received in intelligible form till 9.30 this morning. General Kelley is at Cumberland with his division. General Milroy is concentrating his division, except a few small garrisons in Randolph and Upshur Counties, at Petersburg and Moorefield, in Hardy County. At these positions I have thought they would mutually support each other in case of advance of the enemy west, while Milroy can also protect the country from Beverly west. They also threaten the Shenandoah from these points, and can unite in an advance when desired. General Kelley will report the numbers they can concentrate to the front after deducting their garrisons at post in rear.

J. D. COX,

Major-General.

HEADQUARTERS DEFENSES OF WASHINGTON, December 11, 1862.

General J. G. PARKE,
Chief of Staff, Army of the Potomac:

All the cavalry with General Sigel will accompany him with the exception of about 600 men, under the command of Colonel Wyndham, which will scarcely leave me enough to scout the long line I will have to hold.

S. P. HEINTZELMAN,

Major-General, Commanding.

HEADQUARTERS ARMY OF THE POTOMAC,
Near Falmouth, Va., December 11, 1862-7.30 p.m.

General M. C. MEIGS:

We wish for more animals. I have asked Colonel Rucker for them. Please urge them forward. We occupy Fredericksburg to-night. The main fight, however, will take place to-morrow.

RUFUS INGALLS,

Lieutenant-Colonel, &c.

DECEMBER 11, 1862-6.30 p.m.

Brigadier-General HAUPT,

Superintendent of Military Railroads, Washington:

Our troops occupy Fredericksburg. The bridge material can now be forwarded as rapidly as possible.

JNumbers G. PARKE,

Chief of Staff.

FAIRFAX COURT-HOUSE, VA., December 11, 1862.

SECRETARY OF WAR and

General HEINTZELMAN:

I have the honor to report that the main force of the Eleventh Corps is crossing at Wolf Run Shoals to-day, on their march to Dumfries. The