which they exhibited the circumvolutory movement of the tower, the quick thrusting forth of the immense guns to deliver their ponderous missiles, and then the immediate recoil, and the security behind the closed port-holes. Yet even this will not long be the last and most terrible improvement in the science of war. Already we hear of vessels the armament of which is to act entirely beneath the surface of the water; so that, with no other external symptoms than a great bubbling and foaming, and gush of smoke, and belch of smothered thunder out of the yeasty waves, there shall be a deadly fight going on below,--and, by and by, a sucking whirlpool, as one of the ships goes down. The Monitor was certainly an object of great interest; but on our way to Newport News, whither we next went, we saw a spectacle that affected us with far profounder emotion. It was the sight of the few sticks that are left of the frigate Congress, stranded near the shore,--and still more, the masts of the Cumberland rising midway out of the water, with a tattered rag of a pennant fluttering from one of them. The invisible hull of the latter ship seems to be careened over, so that the three masts stand slantwise; the rigging looks quite unimpaired, except that a few ropes dangle loosely from the yards. The flag (which never was struck, thank Heaven!) is entirely hidden under the waters of the bay, but is still doubtless waving in its old place, although it floats to and fro with the swell and reflex of the tide, instead of rustling on the breeze. A remnant of the dead crew still man the sunken ship, and sometimes a drowned body floats up to the surface.