HEADQUARTERS ARMY OF THE POTOMAC,
September 1, 1864 - 9 p. m.

Major-General WARREN,

Commanding Fifth Corps:

The major-general commanding consents to the substitution of General Crawford's division for that of General Ayres. The commander of the infantry will not have charge of the operation, which is necessarily intrusted to General Gregg, but will support the cavalry. The commanding general requests that you will see that the directions for the movements of the infantry are conveyed to the new commander.

A. A. HUMPHREYS,

Major-General and Chief of Staff.

HEADQUARTERS FIFTH ARMY CORPS,
September 1, 1864.

Major-General HUMPHREYS,

Chief of Staff:

I send the following, just received:

HALIFAX ROAD SIGNAL STATION,

September 1, 1864 - 7.10 p. m.

Lieutenant-Colonel LOCKE,

Assistant Adjutant-General:

From 4.45 p. m. to 6.15 p. m. a cloud of dust was rising at a point north-northwest from station, and about half a mile back of W. P. Davis' house. It moved toward the enemy's front on Halifax road. Cannot tell whether it was troops or trains.

CHAS. L. DAVIS,

Captain, Signal Corps, U. S. Army.

G. K. WARREN,

Major-General.

HEADQUARTERS ARMY OF THE POTOMAC,
September 1, 1864 - 11.45 p. m.

Major-General WARREN,

Commanding Fifth Corps:

The commanding general requests that you will hold all your available troops ready at an early hour to-morrow morning for any contingency that may arise. This will not interfere with the orders already given in regard to Crawford's division.

A. A. HUMPHREYS,

Major-General and Chief of Staff.

HEADQUARTERS FIFTH CORPS,
September 1, 1864 - 3.10 p. m.

General GREGG:

I hear firing somewhere between you and my corps. Do you know anything about it?

G. K. WARREN,

Major-General, Commanding.

P. S. - Will General Parke please have an orderly take above message?

G. K. W.