“Having a look at the jigger?” said a voice behind them, and Elstead stood behind them, spick and span in white, with a cigarette between his teeth, and his eyes smiling out of the shadow of his ample hat-brim. “What’s that about bread and butter, Weybridge? Grumbling as usual about the insufficient pay of naval officers? It won’t be more than a day now before I start. We are to get the slings ready to-day. This clean sky and gentle swell is just the kind of thing for swinging off twenty tons of lead and iron; isn’t it?” “It won’t affect you much,” said Weybridge. “No. Seventy or eighty feet down, and I shall be there in a dozen seconds, there’s not a particle moving, though the wind shriek itself hoarse up above, and the water lifts halfway to the clouds. No. Down there—.” He moved to the side of the ship and the other two followed him. All three leant forward on their elbows and stared down into the yellow-green water. “_Peace_,” said Elstead, finishing his thought aloud. “Are you dead certain that clockwork will act?” asked Weybridge, presently. “It has worked thirty-five times,” said Elstead. “It’s bound to work.” “But if it doesn’t?” “Why shouldn’t it?” “I wouldn’t go down in that confounded thing,” said Weybridge, “for twenty thousand pounds.” “Cheerful chap you are,” said Elstead, and spat sociably at a bubble below. “I don’t understand yet how you mean to work the thing,” said Steevens. “In the first place I’m screwed into the sphere,” said Elstead, “and when I’ve turned the electric light off and on three times to show I’m cheerful, I’m swung out over the stern by that crane, with all those big lead sinkers slung below me. The top lead weight has a roller carrying a hundred fathoms of strong cord rolled up, and that’s all that joins the sinkers to the sphere, except the slings that will be cut when the affair is dropped. We use cord rather than wire rope because it’s easier to cut and more buoyant—necessary points as you will see. “Through each of these lead weights you notice there is a hole, and an iron rod will be run through that and will project six feet on the lower side. If that rod is rammed up from below it knocks up a lever and sets the clockwork in motion at the side of the cylinder on which the cord winds. “Very well. The whole affair is lowered gently into the water, and the slings are cut. The sphere floats—with the air in it, it’s lighter than water; but the lead weights go down straight and the cord runs out. When the cord is all paid out, the sphere will go down too, pulled down by the cord.” “But why the cord?” asked Steevens. “Why not fasten the weights directly to the sphere?”