AUGUSTA, March 26.

A force, reported under General Grierson, came out from Memphis, through Ripley, Miss., one day last week, and made a demonstration against Tupelo. They were met by ----, and retreated toward Memphis.

FROM ALABAMA.-THE DEMONSTRATION AGAINST MOBILE.-PREPARATION FOR THE SIEGE.

AUGUSTA, March 25.

The preparation for the defense of Mobile are very complete. Provisions for a six-months' siege have been accumulated. General Taylor has done everything for the successful defense of the city.

AUGUSTA, March 26.

The demonstration against Mobile, and the flank movement from Pensacola and Milton, are still threatened.

FROM EAST TENNESSEE.

Thomas, having transferred a portion of his army to Knoxville and united with Gillem, is said to be moving in the direction of the Virginia line. At last accounts the advance had reached the vicinity of Greenville, a little over half way from Knoxville to Bristol. the expedition is accompanied by an engineer corps of 2,000 men, who are engaged in rebuilding the railroad as fast as the enemy marches. Communication with the base at Knoxville will thus be kept up. The object of this expedition is, no doubt, to possess and hold Southwestern Virginia, and, if practicable, to move on and capture Lynchburg and thus co-operate with Grant in compelling the evacuation of Richmond and Virginia. The scheme is well conceived, but it will be apt to miscarry in the execution, just as two others have.

T. S. BOWERS,

Assistant Adjutant-General.

SPECIAL FIELD ORDERS, HDQRS. DEPT. OF THE CUMBERLAND, Numbers 82.
Nashville, Tenn., March 29, 1865.

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VI. The Forty-fifth New York Volunteers, upon being relieved from their present duty by the Ninth Michigan Infantry, will report to Brigadier General John F. Miller, commanding post at Nashville, for assignment to duty.

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By command of Major-General Thomas:

SOUTHARD HOFFMAN,

Major and Assistant Adjutant-General.

HEADQUARTERS FOURTH ARMY CORPS,
Lick Creek, East Tenn., March 29, 1865-1 p. m.

Captain H. E. STANSBURY,

Commissary of Musters, Fourth Army Corps, Knoxville:

Let the troops of the Second Division at Knoxville and between there and Flat Creek remain where they are until the bridge is done, then come forward. Send the Second Division wagon train with five days' rations for the men with train and the train guard. As soon as General Elliott arrives at Knoxville have him leave a staff officer to send forward his troops, &c., and you then come to headquarters.

By order of Major-General Stanley:

J. S. FULLERTON,

Assistant Adjutant-General and Chief of Staff.