The motion of the piston is the effect, and the agitation of the water under the paddle-wheels a consequence of the expansion of steam in the cylinder.
We went gliding swift along, dead silent, past the tip of the paddle-box, and past the stern; then in a second or two more we was a hundred yards below the wreck, and the darkness soaked her up, every last sign of her, and we was safe, and knowed it.
It would have sounded just fine during some Mississippi paddle-wheeler race, to “outstrip the competition!”
It was with the greatest difficulty they could get her down to the beach, where presently my brother succeeded in attracting the attention of some men on a paddle steamer from the Thames.
In spite of the throbbing exertions of the engines of the little paddle-boat, and the pouring foam that her wheels flung behind her, she receded with terrifying slowness from this ominous advance.