ALEXANDRIA, August 27, 1862. (Received 4.30 p.m.)

General E. V. SUMNER,

Commanding Second Army Corps, Aquia Creek:

You will please send all of your corps that have not disembarked and all that are now at Aquia Creek and vicinity that can re-embark to this place at once, with batteries, &c. Some yourself.

GEO. B McCLELLAN,

Major-General, Commanding.

WASHINGTON CITY, August 27, 1862-4 p.m.

Major-General McCLELLAN,

Alexandria, Va.:

What news from the front?

A. LINCOLN.

ALEXANDRIA, VA., August 27, 1862. (Received 5 p.m.)

Major-General HALLECK,

General-in-Chief:

Your dispatch received. All orders sent to General Pope will be sent through you.

GEO. B. McCLELLAN,

Major-General.

ALEXANDRIA, VA., August 27, 1862. (Received 9 p.m.)

Major General H. W. HALLECK,

General-in-Chief:

The remains of Twelfth Pennsylvania Cavalry are here; I am collecting them, and will see they have forage and rations to-night, ready to move out on scout in morning. They report enemy in force at Bristoe, Gainesville, and Manassas. Train just fired 1 mile other side of Burke's Station. I find part of Cox's command under orders to take the cars. Will halt it with Franklin's until morning.

Will be up to see you in few minutes.

GEO. B. McCLELLAN,

Major-General.

ALEXANDRIA, August 27, 1862-12.15 p.m.

Captain SAWTELLE,

Fort Monroe:

Discharge all the large steamers as fast as you can; send them to New York. I am sending 5,000 new troops to Yorktown to-day. Couch's division is to come up at once. If you send up the animals rapidly can you not have forage enough or shall I send some to you? I wish to send as little as possible there. The batteries of Couch's division will accompany the division.

By command of Major-General McClellan:

S. WILLIAMS,

Assistant Adjutant-General.