“The submarine stolen!” echoed Jack. “Nonsense, man; you surely cannot mean it!”

“By Jove, I do, then, and that is a fact!” answered Milsom. “Just exactly when she went, or how she went, I know no more than you do; but we missed her a fortnight ago. As you know, it has been our custom to keep about a foot of water in the boat which concealed the submarine, to keep her bottom tight; and, as you may also remember, that water was changed once a week—namely, every Saturday morning. Well, a fortnight ago last Saturday, when the canvas cover was taken off the boat in order to change the water in her, she was found to be empty; the submarine was gone! Who took her, or by what means it became possible to steal her without a single soul being a penny the wiser, I cannot tell you, and I do not believe we shall ever know; for, of course, when I came to question the crew, there was not a man who was not willing to swear that he had never closed his eyes for an instant while keeping an anchor watch, though, of course, something of the kind must have happened. I suspect the custom-house officers that the authorities have insisted on keeping aboard us all the time that we have been in harbour; but of course I have not said a word to them about it. I have, however, watched them continually, and by their smug looks of satisfaction I am inclined to believe that they know something about it. And ever since then I have been on the prowl everywhere to see if I could find any trace of the boat, but without success.”

“Well, old chap,” said Jack, “I am exceedingly sorry to hear this; for in unscrupulous hands that submarine may work a terrific amount of mischief, and everything connected with the working of her is so simple that any ordinarily skilful mechanician could easily puzzle it all out with a little study. Moreover, if she has fallen into the hands of the Spaniards—as I suppose she has—they will have no difficulty in accounting for the mysterious disablement of their ships here on the occasion of the James B. Potter incident, and it will make them so watchful that henceforth we shall be able to do absolutely nothing. But I do not blame you, Phil: you could not be expected to know that these fellows had somehow discovered the existence of the boat; nor could you be expected to watch her night and day. Her loss is a very serious misfortune, of course, but I am convinced that it is not through any carelessness of yours that it happened.”

“Thanks, Jack, for saying that!” answered Milsom; “I did not quite think you would blame me for it: but I cannot help blaming myself to a certain extent; I ought to have been more watchful. Yet how was one to know that the existence of the boat had been discovered? She was guarded night and day, in an unobtrusive way, it is true, and in such a fashion that I believed it quite impossible for anyone to become aware of her existence. Well, she is gone, and we must manage henceforth as best we can without her—unless we can discover her whereabouts and recover possession of her. And now, to change the subject, what do you propose to do with yourselves this afternoon? The Americans are holding a reception aboard the Maine. I suppose you wouldn’t care to go?”

“I think not,” said Jack; “it would be rather too risky. I have come face to face with many Spanish officers during the time that I have been out with the revolutionaries; and if I were perchance to run up against one of them on board that ship it might be awkward. No; I think that the safest plan for Don Hermoso, Carlos, and myself will be to remain quietly aboard here now, and not attempt to leave the yacht again so long as she remains in Cuban waters.”

And upon this opinion the trio acted, remaining below all the afternoon, and not venturing on deck at all until after darkness had fallen.

Dinner was over on board the Thetis, and the three occupants of the saloon, with Milsom, had adjourned to the top of the deck-house to smoke their post-prandial cigars and enjoy the welcome coolness of the night air. The former were entertaining Milsom by relating to him a few of their recent adventures while operating against the Spanish troops when, just as three bells (half-past nine o’clock) was chiming out from the ships in the harbour, a violent concussion was felt by everybody on board the yacht, and simultaneously their ears were deafened by the sound of a terrific explosion. For a space of perhaps two or three seconds following this a dead silence prevailed, and then from the ships afloat and the streets and quays ashore there arose a low murmur, instantly changing to a confused clamour of hurrying feet and shouting voices, expressive of the utmost panic and dismay, which became a perfect uproar when, as everybody involuntarily turned toward the spot from which the explosion had seemed to proceed, it was seen that the American warship Maine was sinking rapidly by the head, while the after part of her was enveloped in flames. And as everybody stared in paralysed horror at the terrible sight, other explosions, though of a much less violent character, were heard on board her! For a second or two astonishment and dismay seemed to have robbed everybody of all power of coherent thought or action; then Milsom started to his feet and shouted in a voice that rang from end to end of the ship:

“Out boats! Each boat her own crew, and no more; you will want every inch of room you can spare for those poor fellows who are struggling for their lives yonder. Hurry, lads, lively now; every second is worth a man’s life, remember, for the harbour swarms with sharks! Ah, here you are, Macintyre—come along with me! Is there steam enough in the steamboat’s boiler to move her? Good! Then we will try her. I want two more hands. Will you come, Jack, and Carlos?”

Of course they would; and in little more than a minute from the first explosion the boats of the Thetis were tearing up the waters of the harbour in a mad race for the honour of being first in the noble work of rescue! And as they went they were joined by boats from the other ships in the harbour, among which were those of the Spanish cruiser Alphonso the Twelfth; as well as a large number which put off from the shore. As the boats went hither and thither, seeking for survivors—and finding remarkably few, considering that the complement of the Maine amounted to three hundred and forty-seven—an officer in one of the Spanish boats came dashing up, and, with a great show of authority, announced that Admiral Manterolas’ orders were that the rescued Americans were to be put aboard the Alphonso the Twelfth, where the injured would receive every attention: accordingly, as soon as the boats of the Thetis had picked up all they could find, they pulled alongside the Spanish warship, and delivered over their living, and in some cases terribly mutilated, freight to her officers and crew. Eighty-six men were rescued, sixty of them being wounded; and of this number the Thetis’s boats were responsible for no less than twenty-nine, of whom seventeen were wounded. When at length, having pulled about for nearly an hour without finding any more people to pick up, Milsom reluctantly gave the word for the boats to return to the ship. The wreck, or rather that portion of her which yet remained above water, was still burning.

It was perhaps rather a peculiar circumstance that, upon the return of the boats from their mission of rescue, the saloon party aboard the Thetis should almost immediately separate and retire to their respective cabins, with nothing more in the way of conversation than a few curt questions and answers. The fact is that they were powerfully impressed with the conviction that they had that night witnessed, and been in an indirect way assisting at, an occurrence that was destined to exercise an important influence upon the history of two great nations. It is true that, at the moment, the occurrence presented all the appearance of a lamentable accident: but everybody was by this time fully aware of the fact that the trend of events had, for some time past, been of such a character as to cause America and Spain to regard each other with the utmost distrust, to which, on the part of Spain, was added a feeling of aversion not very far removed from hatred at what she regarded as the high-handed action of the United States in reference to certain points of dispute between the two countries; and there was probably not one intelligent person in Havana that night who did not feel convinced that unless the lamentable occurrence which had just happened should prove capable of an absolutely satisfactory explanation, there would certainly be very serious trouble in the immediate future. As for Jack and Milsom, they were both thinking hard, and it was well on toward daybreak ere either of them slept. The result of Milsom’s meditations became apparent when, as was the custom, he joined the saloon party at breakfast next morning. After exchanging with them the usual salutations he said, as he drew his chair up to the table: