My cavalry scouts are to-day amusing themselves with the enemy at Malvern Hill. Jackson's movements may be against Buell. The fact of his taking the Gordonsville route would in that case be accounted for by the necessity of their keeping the Petersburg and Danville roads free for the transit of wounded, recruits, and supplies. In any event I try to urge concentration of the masses of troops in front of Washington and the sending of cavalry far to the front. If I am to have Burnside's troops, I would be glad to avail myself of at least a portion of them to occupy a point on south bank of James River. Health of the command improving a little. I should be glad to hear daily from Pope's outpost. It is important that I should do so.

GEO. B. McCLELLAN,

Major-General.

HEADQUARTERS ARMY OF VIRGINIA.

Washington, July 20, 1862.

Major-General McCLELLAN, Berkeley:

Ewell is at Gordonsville with about 6,000 men. Jackson reported to be at Louisa Court-House with 25,000.

My advance posts are at Culpeper and Madison Court-House. It is certain that a considerable force of the enemy is along Virginia Central Railroad west of Hanover Junction.

JNumbers POPE,
Major-General.

Number of men composing the Army of the Potomac on the 20th day of July, 1862.

Aggregate Aggregat Aggregate Total

present e on absent aggregat

for duty special e

duty, present

sick, and

and in absent.

arrest

General McClellan 8,735 1,448 2,157 12,340

and staff, U. S.

Engineers Engineer

Brigade, cavalry

division, escort to

headquarters,

provost guard,

First Connecticut

Artillery, chief

quartermaster.

Second Corps 16,952 2,866 5,665 25,483

(General Sumner's)

Third Corps 16,276 3,180 7,080 26,536

(General

Heintzelman's)

Fourth Corps 14,490 2,627 8,756 25,873

(General Keyes')

Fifth Provisional 21,077 3,900 8,962 33,939

Corps (General

Porter's)

Sixth Provisional 14,014 2,749 5,407 22,170

Corps (General

Franklin's)

Seventh Corps 9,997 1,042 739 11,778

(General Dix's)

U. S. Signal Corps 150 16 29 195

Grand aggregate 101,691 17,828 38,795 158,314

ADJUTANT-GENERAL'S OFFICE,

Washington, D. C., December 31, 1862

It is hereby certified that the preceding statement is accurately compiled from the morning report of the Army of the Potomac of the 20th day of July, 1862, signed by Major-General McClellan and his assistant adjutant-general, Seth Williams, and now file in this office.

E. D. TOWNSEND,

Assistant Adjutant-General.