Abstract from Return of the Department of Virginia, Major General John E. Wool, U. S. Army, Commanding, for March, 1862.

Present for duty.

Command. Officers. Men. Aggregate

present.

Department staff 16 --- ---

Fort Monroe 53 1,203 1,495

Camp Hamilton 240 5,492 6,351

Camp Butler 204 5,109 5,892

Fort Wool 6 152 162

Total 519 11,956 13,900

Pieces of artillery.

Command. Aggregate Heavy. Field.

present and

absent.

Department staff 18 -- --

Fort Monroe 1,643 223 28

Camp Hamilton 6,845 -- 6

Camp Butler 6,217 -- 10

Fort Wool 181 -- --

Total 14,904 223 44

Organization in the Department of Virginia, March 31, 1862.

FORT MONROE.

Major JOSEPH ROBERTS.

10th New York.

99th New York (two companies).

6th Massachusetts Battery.

4th U. S. Artillery (detachment).

Wisconsin Light Artillery.

CAMP BUTLER.

Brigadier General J. K. F. MANSFIELD.

20th Indiana.

5th Maryland.

29th Massachusetts.

1st New York.

2nd New York.

7th New York.

11th New York.

4th U. S. Artillery, Battery L.

CAMP HAMILTON.

Colonel MAX WEBER,

Twentieth New York.

1st Delaware.

16th Massachusetts.

1st Michigan.

20th New York.

99th New York (six companies).

58th Pennsylvania.

2nd Massachusetts Light Artillery, Battery B.

4th U. S. Artillery, Battery D.

11th Pennsylvania Cavalry.

Mounted Rifles (four companies).

FORT WOOL.

Lieutenant Colonel G. B. HELLEDAY.

99th New York (two companies).

[APRIL 1, 1862.-For the organization and composition of the troops of the Army of the Potomac sent to the Peninsula in March and early in April, see Series I, Vol. V., pp. 19-21.]

HEADQUARTERS ARMY OF THE POTOMAC,
Steamer Commodore, April 1, 1862.

Brigadier General J. S. WADSWORTH,

Military Governor:

The commanding general directs that your order at once 4,000 troops from Washington to Manassas, and that your order to that point as fast as they report to you the Tenth Maine, First District of Columbia, Sixtieth New York, and Fifty-fourth Pennsylvania Regiments, which have been latterly employed upon the duty of guarding the Baltimore and Ohio Railroad; also from regiments which the Governor of Pennsylvania has been requested to send to Washington.