In taking leave of the army Gen. Burnside issued the following order:—

Head-quarters Army of the Potomac,
Falmouth, Va., Jan. 26th, 1863.

General Orders No. 9.

By direction of the President of the United States, the commanding general this day transfers the command of the army to Major-General Joseph Hooker.

The short time that he has directed your movements has not been fruitful of victory or any considerable advancement of our lines; but it has again demonstrated an amount of courage, patience, and endurance that, under more favorable circumstances, would have accomplished great results. Continue to exercise these virtues, be true in your devotion to your country and the principles you have sworn to maintain, give to the brave and skilful general who has so long been identified with your organization, and who is now to command you, your full and cordial support and coöperation, and you will deserve success.

In taking an affectionate leave of the entire army, from which he separates with so much regret, he may be pardoned if he bids an especial farewell to his long-time associates of the Ninth Corps.

His prayers are that God may be with you, and grant your continual success until the rebellion is crushed.

A. E. BURNSIDE,
Major-General.

Mr. Lincoln's letter to General Hooker, informing the latter of his appointment, did credit alike to the President's head and heart, and is worthy of a place here:—

Executive Mansion,
Washington, D.C., January 26th, 1863.