SIR:—You will proceed to New York, and with the least possible delay, assuming command of any naval steamer available, proceed to Pensacola Harbor, and at any cost or risk prevent any expedition from the mainland reaching Fort Pickens or Santa Rosa Island.

You will exhibit this order to any naval officer at Pensacola, if you deem it necessary, after you have established yourself within the harbor, and will request co-operation by the entrance of at least one other steamer.

This order, its object, and your destination will be communicated to no person whatever until you reach the harbor of Pensacola.

A. LINCOLN.

Recommended, WILLIAM H. SEWARD.

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RELIEF EXPEDITION FOR FORT SUMTER

ORDER TO OFFICERS OF THE ARMY AND NAVY.

WASHINGTON, EXECUTIVE MANSION, April 1, 1861.

All officers of the army and navy to whom this order may be exhibited will aid by every means in their power the expedition under the command of Colonel Harvey Brown, supplying him with men and material, and co-operating with him as he may desire.