“By the look of that boat, and the pace at which she is coming through the water, it appears to me, young man, that something has gone very seriously wrong with the little job that you undertook to do yesterday. Are you quite sure that you removed the nut?”
“Absolutely certain,” answered Jack cheerfully.
“Then how do you account for the fact that she has not yet dropped her propeller?” demanded Milsom.
“Easily enough,” answered Jack. “She got under way, like ourselves, by steaming ahead and sweeping round in a wide circle. So long as her engines continue to turn ahead, her propeller will probably retain its position on the shaft, kept there by the pressure of the water on its blades; but the moment that she eases down, it will probably drop off, or, if not then, it certainly will at the instant when her engines are stopped. Don’t be alarmed, Phil; you have only to cause her to stop her engines, and you will see what will happen.”
“Then,” said Milsom, as he laid his hand upon the bridge telegraph and signalled “Full speed ahead”, “we will entice her a bit farther out to sea before we do anything more. If she runs out of sight of the anchorage before breaking down we shall get a nice little start, and shall probably not be interfered with for the rest of the trip. Ah, there is the edge of the bank ahead of us!” as a line of demarcation between the pale, greenish-blue water over the reef and the deep-blue water beyond it became visible. “Let her go off to due south,” to the quartermaster at the wheel; “we’ll try to persuade them that we are bound for Havana!”
“A stern chase is a long chase”, especially when one craft has five or six miles start of the other, and the pursuing craft has only a single knot’s—or perhaps not quite so much as that—advantage in speed; it was consequently not until the brief dusk was deepening into darkness, and the great mellow stars were leaping into view in the rapidly deepening azure of the sky, that, the Thetis being by that time about midway between Key West and Havana, Milsom rang down to the engine-room for half speed, and allowed the torpedo boat to range up abreast of the yacht. This she did at a distance of about a quarter of a mile, without making any attempt to speak to or interfere with the English vessel, merely slowing down to regulate her pace to that of the yacht. Then Milsom spoke down through the voice tube, ordering the engines to be first stopped, and then to go slowly, but at a gradually increasing speed, astern, by which means he quite expected to induce the commander of the torpedo boat to stop. The result was everything that could have been desired, for as soon as the Spaniard realised that he was running ahead of the yacht in the most unaccountable way, he stopped his engines and waited patiently for the other vessel to overtake him, his propeller doubtless slipping off the tail-shaft and going to the bottom at the instant of the stopping of the engines. But while the torpedo boat, deprived of the drag of her propeller, continued to forge strongly ahead under the impetus of her own momentum, the Thetis was even more rapidly widening the distance between herself and the torpedo boat by going full speed astern, until, when the two craft were separated by some three miles of heaving water, the perplexed and astounded Spanish lieutenant, still ignorant of what had happened, made up his mind to go back to see what the English ship was about, and, ordering his helm to be put hard over, rang down to his engine-room for “full speed ahead”. Then the furious racing of his engines, as steam was admitted into the cylinders, revealed the ghastly truth that he had lost his propeller and was absolutely helpless, with the nearest land fully forty miles away. He rushed from the bridge down into the tiny engine-room, to consult with and explosively reprimand the engineers for permitting such a mishap to occur; and at length, when his vexation had worked itself off, returned to the deck and gave orders for signals of distress to be made, by means of rockets, to the English yacht. But by that time the Thetis had vanished in the darkness; nor did she re-appear, although the unfortunate lieutenant expended his entire stock of rockets in a vain attempt to attract her attention.