Nbw York, 5th. A lottcr from the stenmer Nor w eb, oft' Georgetown S. C . States tliat, a rebel fort was dostroyed and seven rebels killed. Contrabande say a good deal of sickness exists at Georgetown. 'I'liey also state lh.it a 'ix gun floating battery ia being built at Charleston, and a ten inch thiek iron :lad ; alao that thero are four large cotton l.iden steamers at CharlestOD, waiting to run tho blockade. B@u It is soul that Lord Lyons was detained in Eugland to nllow time for Ministers to preparo important dispatches for the United States government, whicli have been deterniincd on by tlie late cveiita whicli have ocourrod in tho United States. - in M in Rp Draftod men by thouands are crossing in every train to Harrisburg, Pa. Campa are to be establishcd it different points along tlie border, in whicli they will be stationcd, and this will avert tho dangor of anotlier cavalry raid. Ug" Oen. McClellan has expretiged t!ie wis!) tliat (lio Provost Marshals will return to their respective regiments all tho strasrglng oificers they can piek up. Over 2,000 of thflse wortliics are absent without lonve.