The sail was sleepily set. Humbugging about with stunsails to the cat's-paws little pleased the men, especially at night. For three days they had been boxhauling the yards about to no purpose, and it was sickening work running stunsail-booms out to airs that died in their struggles to reach us. However, here was a draught at last, and the old gurgling and moaning sounds of the breathless, sluggish swell washing heavily like liquid lead to the sides were replaced by the tinkling noises of waters parting at the bows with a pretty little seething of expiring foam, and the hiss of exploding froth-bells. At eleven o'clock the light breeze was still holding, and the ship was floating softly through the dusk, the paring of moon swaying like a silver sickle over the port mizzen topsail yard-arm, everything quiet along the decks, no light save the sheen from the lamps in the binnacle, and nothing stirring but the figure of a man on the forecastle pacing athwartships, and blotting out at every step a handful of the stars which lay like dust on the blackness, under the yawn of the forecourse. On a sudden a steamer's lights showed on the starboard bow--a green beam, and a yellow one above, with the water on fire beneath them, and sparks floating away upon her coil of smoke, that made you think of the spangles of a falling rocket. She went past swiftly, at no great distance from us. There was not a moan in the hot breeze to disturb the wonderful ocean stillness, and you almost thought you caught the beating of the iron heart in her, and the curious monotonous songs which engines sing as they work. She swept past like a phantom, running a line of illuminated windows along, which resembled a row of street-lamps out in the darkness; and as she came on to our quarter she struck seven bells (half-past eleven), the rich metallic notes of which I clearly heard; and with the trembling of the last stroke upon the ear her outline melted. At that instant a peculiar thrill ran through the ship. It may be likened to the trembling in a floor when a heavy waggon passes in the street outside. It was over in a breath, but I could have sworn that it was not my fancy. I walked aft to the wheel, and said to the man, "Did you notice anything just now?" "Seemed to me as if the vessel trembled like," he replied. As he spoke the ship shook again, this time strongly. It was something more than a shudder; the sensation was for all the world as though she had scraped over a shoal of rock or shingle. There was a little clatter below, a noise of broken glass. The watch, who had been dozing on deck, sprang to their feet, and their ejaculations of surprise and fear rolled in a growl among them. The captain ran out of the companionway in his shirt and trousers. "What was that, Mr. Balfour?" he bawled. "Either the shock of an earthquake," said I, "or a whale sliding along our keel." "Get a cast of the lead! get a cast of the lead!" he shouted.