FAIRFAX COURT-HOUSE, March 14, 1862.

(Received 3 p. m.)

Honorable E. M. STANTON, Secretary of War:

For especial reasons, I have changed the organization of the army corps as follows: First Corps, McDowell; divisions, Franklin, McCall, and King. Second corps, Sumner; division, Richardson, Blenker, Sedgwick. Third Corps, Heintzelman; divisions, Hooker, Hamilton, Smith. Fourth Corps, Keyes; divisions, Porter, Couch, Casey. Fifth Corps, Banks; divisions, Williams and Shields.

GEO. B. MCCLELLAN,

Major-General.

HEADQUARTERS ARMY OF THE POTOMAC,
March 14, 1862 - 3 p. m. (Received 3.30 p. m.)

Honorable E. M. STANTON, Secretary of War:

As fast as transportation is ready we shall move to the new line of operations. It is important that the available force at Fort Monroe should be under the control of the commander of the army acting there, and I desire to form another division, under Mansfield, from the troops now in the vicinity of Fort Monroe, and to annex that division to the First Army Corps as soon as McDowell is confirmed as major-general. First Corps leads the movement.

GEO. B. MCCLELLAN,

Major-General.

Numbers 5.] FAIRFAX COURT-HOUSE,

March 14, 1862. (Received 4.10 p. m.)

Honorable E. M. STANTON, Secretary of War:

I would advise that no change be made now in the organization of divisions. It would be very pernicious at such a moment at this. The division is the real unit of force, and should be intact. The third word is omitted in your dispatch, and I do not know whether you mean Kearny or Richardson; but it makes no difference, as my opinion is based on general principles. I am hard at work.

GEO. B. MCCLELLAN,

Major-General.

FAIRFAX COURT-HOUSE,

March 14, 1862 - 5.30 p. m. (Received 6 p. m.)

Honorable E. M. STANTON, Secretary of War:

* * * * * * *

All goes well. Franklin, McCall, Keyes, and McDowell are en route; also the regulars. I will not disappoint you. Porter and Smith start in the morning.

GEO. B. MCCLELLAN,

Major-General.

BUDD'S FERRY, March 14, 1862 - 9 a. m.m.

General S. WILLIAMS:

All of the rebel batteries extending from Cockpit Point to Aquia Creek are now utterly demolished. All the guns that were worth pre