...rength, strongly garrisoned, and covered by a fleet of three gunboats, under Capt. Tatnall, late of the U. S. Navy, besides strong land forces, which the rebels were concentrating from Charleston and Savannah . The troops of the rebels were afterward ascertained to have been commanded by General Drayton. One of the forts, and probably the strongest, was situated on Hilton Head, and the other two on Phili...