“Fire! Fire!” whooped Amos, showing the most intense excitement, for if there was any chance to add to the confusion of the moment he meant to do it.
He had but one object in view, which was to so fill the Greek crew with consternation that they would, to a man, leap overboard, and leave the apparently doomed vessel to their erstwhile passengers.
The plan began immediately to show signs of bearing fruit. As has been said before, the crew knew full well what sort of a dangerous cargo they were carrying. High explosives have a habit of going off when brought in contact with a tongue of flame. When, therefore, they saw the black smoke pouring out of the hold their first thought was that, in a few seconds, there would come a terrific crash, and the powerboat
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 would be scattered in atoms over the surface of the sea.
Their loud cries of alarm rang out, as the boys had anticipated. One who by some chance was close to the rail instantly plunged overboard, vanishing under the water like a stone, and doubtless bent on keeping there as long as he could hold his breath, meanwhile swimming desperately away from the still moving craft.
A second and yet a third man saw him go, and evidently thought that the only way out of the fix, for they started to imitate his example.
Not so the skipper, who was evidently made of different stuff. The boys in commenting on his determined looks had not guessed far from wrong when they decided that Captain Zenos was a reckless customer who had run many a blockade for the sake of gain, just as he was now trying to get guns and ammunition to the sorely pressed Turks on Gallipoli Peninsula.
He saw the smoke just as soon as the rest of the crew, but instead of thinking of his safety,
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 the old sea dog’s first idea was to try and save the boat and cargo, even at great personal risk.
What he shouted in his lion-like voice the boys did not know, not being proficient Greek scholars. They could give a pretty good guess, however, that he was roaring out orders to his men to follow him into the hold and try to put out the fire that had so mysteriously broken out when they were off their guard.
He made direct for the open hatch from which that dense smoke oozed. Three men followed on his heels, being possibly the possessors of the same reckless nature as himself, or else descendants of those old-time Spartans who would obey orders from their superiors blindly, no matter if they had to charge into the very jaws of death.
Jack was observing all this with the most intense interest. He even noted that the man at the wheel stuck to his duty. From this fact he supposed the skipper had not forgotten him when roaring out his orders, and that he had been
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 directed to stay where he was, come what may.
There were three in the water by now, and doubtless all making desperately for the nearby shore of the island, anxious to put many fathoms between themselves and the doomed craft before the terrible explosion came.
Captain Zenos snatched up a bucket that stood near. Leaning over the rail he flung it downward and once more he drew it up filled to the brim with salt water.
Each of the three sailors followed his example with exact precision, like men who knew the value of obedience in an emergency. By this time the skipper had reached the open hatch. That dense smoke showed no signs of abating; in fact, if anything, it was oozing forth in greater volume than ever, thanks to Jack’s clever arrangements below.
 
That dense smoke showed no signs of abating.—Page 44
One last look the valiant skipper gave around, as if to make sure that his crew had not entirely deserted him. Then without the slightest hesitation he plunged into the opening and vanished from view.
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Jack and Amos could not repress cries of sincere admiration. If they had from some instinctive reason disliked the battle-scarred old veteran of the blockade and gun-running game, they now admired his great nerve. Evidently, with all his faults, and they were many, Captain Zenos could never be accused of cowardice.
One, two, three figures took the drop after him, not one of the trio showing the slightest hesitation. Perhaps these men had long been associated with the owner of the big powerboat, and imbibed a full share of his daring.
The tail-end man did take a look around before dropping out of sight, and Jack imagined he felt he might be saying good-by to the bright world, for it certainly did seem as though the chances were ten to one they might never come forth again.
As far as it went this was all very fine. Three were in the water madly racing for the shore of the island; another trio had accompanied the leader below; and the last member of the crew stood by the wheel, though the speed of the boat
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 had been reduced until she was now beginning to pass but slowly through the twilight sea.
But Jack realized that as soon as those groping through the dense smoke below found that its source lay in a galvanized bucket, and that the smudge had apparently been created for some distinct purpose, their suspicions would be immediately aroused.
Since they would speedily come pouring forth as furious as could be and turn upon the two boys for an explanation of the trick, it was up to Jack and Amos to prevent such an unhappy consummation.
“The hatch—we must clap it on, and batten the same down!” cried Jack.
Even as he spoke he was jumping toward the smoke cloud, with Amos close at his heels. What few words Jack had spoken revealed the plan of campaign to his comrade, who was only too ready to assist in the deal.
The man at the wheel must have stared hard at seeing the two boys thus start forward instead of jumping overboard like those others had
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 done. Perhaps he even gave them credit for the same species of sublime courage that the skipper possessed. When, presently, he saw what they were doing, astonishment kept him from trying to interfere until it was too late to do any good.
Seizing hold of the heavy hatch, the two boys managed to throw it into place. There was means for securing it so that even if great waves swept over the low deck of the powerboat they could hardly tear the hatch loose, and flood the hold.
Thanks to his habit of observation, Jack knew all about this, and also how the fastenings were applied. Amos, taking his cue from his comrade, also gave such assistance as lay in his power; and between them they speedily managed to accomplish their desired end.
Hardly had they succeeded in doing this than there came heavy pounding on the other side of the hatch. Evidently the skipper had learned how he had been made the victim of what he would call a “scurvy trick”; and was fairly wild
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 to force a way out of the hold, so that he could punish those responsible for it.
Jack had not forgotten the man at the wheel, who had it in his power, should the inclination come to him, to injure the engine of the boat in some way, so as to prevent any further progress.
As this would be greatly to the disadvantage of the two comrades, Jack did not mean to permit the man to have the least chance of carrying out his intention.
Leaving Amos standing by the battened hatch, pistol in hand, Jack rushed straight toward the man at the wheel. He covered him with his weapon, and, under the belief that the fellow knew English, for he had conversed with several of the crew before then, the boy called out sternly:
“Stay where you are, and hold the wheel, and no injury will come to you. There is no fire and we will not be blown up. It was a trick to get the captain down in the hold. He is our prisoner, and we expect to run this boat from now on. Do you understand what I am saying?”
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The sailor looked a little dazed as though events were happening with such wonderful rapidity that he could hardly keep track of them. Still he seemed to be able to understand English, especially when accompanied by the significant gestures Jack was making with the little automatic pistol.
He immediately elevated his right hand. That was doubtless intended to show his willingness to submit to whatever fate the daring captors of the powerboat felt inclined to impose upon him.
“Start up the engine again and keep it going full speed!” was the first order the new skipper gave the pilot.
Presently the boat began to pick up, as the propeller churned the water. It felt good to Amos, standing there and listening to the terrific pounding on the lower side of the hatch. He took off his hat and waved it about his head as he gave a loud, boyish hurrah that came from the depths of his heart.
No doubt that organ was pounding against his
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 ribs with the furious energy of a trip-hammer; but apparently the danger point had been safely passed, and they had a free course open before them.
The three men who jumped overboard had meanwhile managed to reach shallow water. They were standing, up to their waists in the sea, at what they considered a safe distance from the powerboat, staring at the now moving craft as though unable to believe their eyes.
The smoke had ceased coming up from the hold as soon as the hatch was clapped on, and, with the starting of the engine, the boat showed signs of leaving the unfortunate trio in the lurch—at least they must have considered themselves in a bad box at the time, though later developments proved that they were exceedingly fortunate.
Loud rang out their shouts as they made all sorts of wild gestures, imploring their companions not to desert them. Perhaps the simple fellows, not aware of the dramatic acts that were taking place aboard the boat, imagined the skipper
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 meant to discipline them for deserting when there was need of their services.
Amos waved his hand hilariously toward the three. He was feeling in a merry mood. The bright scheme which Jack originated had turned out so successful!
One look gave Jack his course, and he impressed it upon the pilot.
“We want to head straight as an arrow for the Dardanelles,” he said sternly. “You will be all right as long as you behave, but the first sign of treachery and it means your end. Our lives are at stake now and we will shoot you down like a dog if you turn on us. We want to run across some warship of the Allies, to whom this boat and its cargo can be surrendered. And if you behave we will guarantee that you are let go free. Get that?”
The man had listened intently, watching every gesture made by Jack. At the conclusion of the short harangue he nodded his head and even allowed a grim smile to flit athwart his dark face. Being a daring chap himself he could admire an
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 exhibition of American pluck such as the two boys were displaying. Anyone who managed to get the better of a sly old sea-dog like Captain Zenos must be pretty wide-awake, according to his opinion.
“I play you the game straight, I promise you!” he assured Jack, who, however, did not take his word for it, knowing how treacherous some men can be when conditions change; and he meant to keep the Greek pilot under constant surveillance until their plans had been fully carried out.