a flash from the river was followed by a deep boom, as a heavy shot left the muzzle of a cannon on the steamers. But through it all, the men escaped; and the projected invasion of the Confederates was abandoned, owing to the loss of their schooner. All through the war this untiring patrol of the Potomac was continued. Among miasmatic vapors and clouds of noxious insects on mud-flats, in narrow channels whose densely wooded banks might conceal legions of hostile sharp-shooters, the river navy kept up its work. Earning but little glory, though in the midst of constant peril, the officers and men kept up their work, and contributed not a little to the final outcome of the great conflict. All this time the officers of the naval vessels, riding at anchor in Hampton Roads, were chafing under the enforced idleness. Even the occasional artillery duels with which their army brethren whiled away the time were denied to the wistful blue-jackets. Beyond an occasional chase, generally useless, after a fleet blockade-runner, the sailors had absolutely no employment. At last, however, the opportunity came. The first great naval expedition of the war was set under way. From Cape Henry, at the mouth of the James River, the coast of Virginia and North Carolina sweeps grandly out to the eastward, like a mammoth bow, with its lower end at Beaufort, two hundred miles south. Along this coast-line the great surges of mighty ocean, rolling with unbroken course from the far-off shore of Europe, trip and fall with unceasing roar upon an almost uninterrupted beach of snowy sand, a hundred and more miles long. Near the southern end of this expanse of sand stands a lighthouse, towering solitary above the surrounding plain of sea and sand. No inviting beacon giving notice to the weary marines of safe haven is this steady light that pierces the darkness night after night. It tells of treacherous shoals and roaring breakers; of the loss of many a good ship, whose ribs, half buried in the drifting sand, lie rotting in the salt air; of skies ever treacherous, and waters ever turbulent. It is the light of Hatteras. Some twenty miles below Cape Hatteras light occurs the first great opening in the stretch of sand that extends south from Cape Henry. Once he has passed through this opening; the mariner finds himself in the most peaceful waters. The great surges of the Atlantic spend themselves on the sandy fringe outside, while within are the quiet waters of Pamlico and Albemarle Sounds, dotted with fertile islands, and bordering a coast rich in harbors. The wary blockade-runner, eluding the watchfulness of the United States blockaders cruising outside, had but to pass the portals of Hatteras Inlet, to unload at his leisure his precious cargo, and load up with the cotton which grew in great abundance on the islands and fertile shores of the sound.