BALTIMORE, MD., July 30, 1864-4 p. m.

(Received 6 p. m.)

Major-General HALLECK,

Chief of Staff:

I have just received the following from Colonel Clendenin:

If I had Delaware cavalry now could use them to advantage. The cavalry that was at Point of Rocks is reported falling back on Frederick. Rebels reported crossing at Point of Rocks, 400 strong. My cavalry are moving out and will ascertain. I think they are rebel this time.

I have sent the First Delaware Cavalry to Clendenin. I had directed Clendenin to move in the direction of Emmitsburg, in obedience to your recent order, but have now countermanded the order until Clendenin reports again. I have a force of cavalry patrolling the roads from Liberty, through Middleburg, and as far up as Hanover, and get reports by telegraph via Westminster.

LEW. WALLACE,

Major-General.

BALTIMORE, MD., July 30, 1864-5 p. m.

(Received 6 p. m.)

Major-General HALLECK,

Chief of Staff:

I have received the following from Colonel Clendenin, at the Monocacy:

Thirty cavalry have fallen back from the Potomac. They had a skirmish with the enemy and report losing 20 men. I fear the down trains is captured, as lieutenant reports having heard the whistle. I am ready for the rebels.

LEW. WALLACE,

Major-General.

BALTIMORE, MD., July 30, 1864-8 p. m.

(Received 8. 10 p. m.)

Major-General HALLECK,

Chief of Staff:

Information just received from Colonel Clendenin states that the enemy cut the wire near Adamstown, but did not destroy the railroad. He says only 100 crossed, and they have gone back. Captain Sullivan is following them.

LEW. WALLACE,

Major-General.

BALTIMORE, MD., July 30, 1864-10 p. m.

Colonel E. D. TOWNSEND,

Assistant Adjutant-General:

After a fight Clendenin's cavalry drove Mosby, and is now pursuing him on the southern bank of the river. Rebels not more than 100. If they come back I will have them fought. General Tyler is carefully guarding his line.

LEW. WALLACE,

Major-General.