MONOCACY, MD., August 5, 1864-11 a. m.

Major General H. W. HALLECK,

Chief of Staff:

Following just received from General Howe, dated 10 a. m. 5th:

No movements observed this morning Charlestown way. A large force of cavalry and a large wagon train reported on the Maryland side, moving toward Sharpsburg.

D. HUNTER,

Major-General, Commanding.

WASHINGTON, D. C., August 5, 1864.

Major-General HUNTER,

Monocacy:

About 2,000 of General Sheridan's cavalry will move out this afternoon by the Rockville and Frederick pike. The remainder will follow as soon as it arrives and is supplied. It is reported that the rebels are in Hagerstown.

H. W. HALLECK,

Major-General and Chief of Staff.

MONOCACY JUNCTION, August 5, 1864-4.45 p. m.

(Received 6.30 p. m.)

Major-General HALLECK,

Chief of Staff:

Following just received from one of my aides, dated Harper's Ferry, 3.45 p. m.:

The rebel force crossed appears to be mostly cavalry. About 6,000 reported crossed up to this hour. Their immense wagon train would seem to denote a raid for plunder. Would it not be well to watch Loudoun closely?

D. HUNTER,

Major-General, Commanding.

HARPER'S FERRY, VA., August 5, 1864-3 p. m.

(Received 3.30 p. m.)

Colonel JAMES A. HARDIE,

Inspector-General:

The signal officer on Maryland Heights reports having seen three divisions of infantry cross at Shepherdstown this morning, but thinks they have not gone far from the river; also, about 300 wagons, which moved to Antietam, guarded by cavalry and a battery, scattering at that point, and can be seen in small numbers through the country procuring supplies. A portion of the Nineteenth moved up on Maryland Heights this morning.

WM. SINCLAIR,

Major, &c.

HARPER'S FERRY, August 5, 1864.

(Received 11.15 p. m.)

Colonel JAMES A. HARDIE,

Inspector-General:

Lieutenant Wyckoff, First New York (Lincoln) Cavalry, has just arrived from Antietam Creek. He was at the Mountain House in the