The coast of North Carolina is honeycombed with rivers, inlets, and lagoons, which open into the two broad sounds known as Pamlico and Albemarle, and which are protected from the turbulence of the Atlantic by the long ridge of sand which terminates at Cape Hatteras. While the capture of the Hatteras forts had given the Union authorities control of Hatteras Inlet, the chief entrance to the sounds, yet the long, narrow island was broken by other lesser inlets of a size sufficient to permit the passage of light-draught steamers. The Confederates had quite a fleet of swift, light vessels of insignificant armament, often only a single gun, with which they occasionally made a descent upon some coaster or merchantman, running close inshore, and dragged her in as a prize. With these swift steamers, too, they effectually controlled all navigation of the sounds. But the greatest advantage that they derived from their control of the sounds was the vast facilities given them for constructing, at their leisure, powerful iron-clads in some of the North Carolina shipyards; then sending them to reduce the Hatteras forts, and so out into the Atlantic to fight for the destruction of the blockade. All these conditions were clear to the authorities of the Union; and therefore, in the early part of January, 1862, a joint military and naval expedition was fitted out for operation against the Confederate works and steamers in these inland waters. It was in the early days of the war; and the flotilla was one of those heterogeneous collections of remodelled excursion-steamers, tugs, ferry-boats, and even canal-boats, which at that time was dignified with the title of "the fleet." In fitting out this expedition two very conflicting requirements were followed. In the most favorable circumstances, the channel at Hatteras Inlet is seldom over seven and a half feet: consequently the vessels must be of light draught. But the Confederate steamers in the sounds carried heavy rifled cannon, and the armament of the forts on Roanoke Island was of the heaviest: therefore, the vessels must carry heavy guns to be able to cope with the enemy. This attempt to put a heavy armament on the gun-deck made the vessels roll so heavily as to be almost unseaworthy. [Illustration: Shores of Albemarle Sound.]