JANUARY 2D.-The enemy are making preparations to assail us everywhere. Roanoke Island, Norfolk, Beaufort, and Newbern; Charleston, Savannah, Mobile, Pensacola, and New Orleans are all menaced by numerous fleets on the sea-board, and in the West great numbers of iron-clad floating batteries threaten to force a passage down the Mississippi, while monster armies are concentrating for the invasion of Tennessee and the Cotton States. Will Virginia escape the scourge? Not she; here is the bull’s-eye of the mark they aim at.