BALTIMORE, MD., July 4, 1864.

(Received 3. 30 p. m.)

Colonel E. D. TOWNSEND,

Assistant Adjutant-General:

Telegram just received from Gettysburg of this of this date says: "Rebels are in Hagerstown in force coming down the Valley. "

LEW. WALLACE,

Major-General, Commanding.

HDQRS. MIDDLE DEPARTMENT, EIGHTH, ARMY CORPS,
Baltimore, July 4, 1864.

Brigadier General E. B. TYLER,

Relay House, Baltimore and Ohio Railroad:

Has there been any demonstration on the part of the enemy at the Monocacy or the Junction? Send no troops beyond the Monocacy without instructions from these headquarters.

By order;

SAML. B. LAWRENCE,

Assistant Adjutant-General.

BALTIMORE, MD., July 4, 1864.

(Received 3. 50 p. m.)

Major-General HALLECK:

Through Mr. Prescott Smith, of the Baltimore and Ohio Railroad, I learn the following:

Weber was attacked at 10 a. m. ; will probably have to withdraw to Maryland side of he has not already. Sigel and Mulligan are falling back on Harper's Ferry on the Maryland side of the river, but will probably arrive too late. There must be two columns, one operating by way of Hagerstown, the other against Harper's Ferry.

LEW. WALLACE,

Major-General.

BALTIMORE, MD., July 4, 1864 - 4 p. m.

Major General H. W. HALLECK,

Chief of Staff:

I have the honor to send you the following dispatch:

MONOCACY, MD., July 4, 1864 - 2 p. m.

Major General LEW. WALLACE,

Baltimore, Md.:

Telegraph is communication cut west of Frederick. Operator at Point of Rocks says the enemy have crossed one-half mile west of that point. He has since left the sent another detachment in that direction. I have three companies, and General just sent another detachment in that direction. I have three companies, and general Weber one, at this post. We can give then a sharp fight if they attacks us in front.

E. B. TYLER,

Brigadier-General.

LEW. WALLACE,

Major-General.