...nds the harbor, and is very strongly fortified. The Hayneville (Ala.) Guards arrived at Warrington on Sunday morning last, and were marched to Fort Barrancas. There are several companies from Alabama and Mississippi, in Mobile, which are expected to arrive by steamer to-day, at the Perdido river; from thence they will march to Fort Barrancas.--Lieut. Slimmer, who holds Fort Pickens, spiked all th...