HEADQUARTERS DEPARTMENT OF WASHINGTON, April 15, 1865-1 a., m.

General GAMBLE,
Commanding at Fairfax Court-House:

The President, Mr. Lincoln, was shot at Ford's Theater last night, and is now dying. Mr. Seward was stabbed in bed and is not expected to recover. The expedition for to-morrow will have to be abandoned, as I wish you at daylight to take your cavalry and scatter it along the river toward Leesburg to arrest and send in all suspicious persons; also along your whole line between it and Washington.

C. C. AUGUR,

Major-General.

HEADQUARTERS DEPARTMENT OF WASHINGTON, Washington, D. C., April 15, 1865.

Brevet Brigadier-General GAMBLE,
Fairfax Court-House:

The movement is suspended by order of Major-General Hancock.

By command of Major-General Augur:

A. R. SEWALL,

Lieutenant and Acting Assistant Adjutant-General.

FAIRFAX COURT-HOUSE, April 15, 1865-7 p. m. (Received 7.50 p. m.)

Lieutenant Colonel J. H. TAYLOR:

COLONEL: Reports from the several posts on the line state all quiet. I sent out a scout of 100 men under Captain Corbit, Eighth Illinois Cavalry, last night to Warrenton, which has just returned all safe, capturing General Payne, Lieutenant Digges, aide-de-camp, and three rebel cavalrymen. These prisoners will be forwarded under guard to your headquarters by railway to-morrow. I have to report that General Slough has stopped all trains to Fairfax Station to-day, consequently no mail matter or dispatches have been received since yesterday. If this is continued it will be necessary for me to communicate with you headquarters daily by a cavalry escort. please inform me. Eight hundred cavalrymen started early this morning, under Colonels Sweitzer and Clendenin, to execute the last order received by telegram at 3.30 a. m., to arrest suspicious persons.

W. GAMBLE,

Colonel, Commanding Brigade.

HEADQUARTERS DEPARTMENT OF WASHINGTON, TWENTY-SECOND ARMY CORPS, Washington, D. C., April 15, 1865.

General GAMBLE,
Fairfax Court-House:

You have been ordered to patrol all the country between your headquarters and Washington. All persons arrested must be held subject to orders from these headquarters.

By command of Major-General Augur:

J. H. TAYLOR,

Chief of Staff and Assistant Adjutant-General.