As the boy went away, and Tom closed the door, he turned to Lieutenant Marbury.
“You were about to give me another warning when that interruption came. You might complete it now.”
“Yes, it was another warning,” spoke the officer, “and one I hope you will heed. It concerns yourself, personally.”
“Do you mean he is in danger?” asked Ned quickly.
“That’s exactly what I do mean,” was the prompt reply. “In danger of personal injury, if not something worse.”
Tom did not seem as alarmed as he might reasonably have been under the circumstances.
“Danger, eh?” he repeated coolly. “On the part of whom?”
“That’s just where I can’t warn you,” the officer replied. “I can only give you that hint, and beg of you to be careful.”
“Do you mean you are not allowed to tell?” asked Ned
“No, indeed; it isn’t that!” the lieutenant hastened to assure the young man. “I would gladly tell, if I knew. But this plot, like the other one, directed against the inventions themselves, is so shrouded in mystery that I cannot get to the bottom of it.
“Our Secret Service men have been working on it for some time, not only in order to protect you, because of what you have done for the government, but because Uncle Sam wishes to protect his own property, especially the searchlight and the big cannon. But, though our agents have worked hard, they have not been able to get any clues that would put them on the right trail.
“So we can only warn you to be careful, and this I do in all earnestness. That was part of my errand in coming here, though, of course, I am anxious to inspect the new aerial warship you have constructed. So watch out for two things—your inventions, and, more than all, your life!”
“Do you really think they would do me bodily harm?” Tom asked, a trifle skeptical.
“I certainly do. These foreign spies are desperate. If they cannot secure the use of these inventions to their own country, they are determined not to let this country have the benefit of them.”
“Well, I’ll be careful,” Tom promised. “I’m no more anxious than anyone else to run my head into danger, and I certainly don’t want any of my shops or inventions destroyed. The fire in the red shed was as close as I want anything to come.”
“That’s right!” agreed Ned. “And, if there’s anything I can do, Tom, don’t hesitate to call on me.”
“All right, old man. I won’t forget. And now, perhaps, you would like to see the Mars,” he said to the lieutenant.
“I certainly would,” was the ready answer. “But hadn’t you better see those men who are waiting to find out about positions here?”
“There’s no hurry about them,” Tom said. “We have applicants every day, and it’s earlier than the hour when I usually see them. They can wait. Now I want your opinion on my new craft. But, you must remember that it is not yet completed, and only recently did I begin to solve the problem of mounting the guns. So be a little easy with your criticisms.”
Followed by Ned and Lieutenant Marbury, Tom led the way into the big airship shed. There, Swaying about at its moorings, was the immense aerial warship. To Ned’s eyes it looked complete enough, but, when Tom pointed out the various parts, and explained to the government officer how it was going to work, Ned understood that considerable yet remained to be done on it.
Tom showed his official guest how a new system of elevation and depressing rudders had been adopted, how a new type of propeller was to be used and indicated several other improvements. The lower, or cabin, part of the aircraft could be entered by mounting a short ladder from the ground, and Tom took Ned and Lieutenant Marbury through the engine-room and other compartments of the Mars.
“It certainly is most complete,” the officer observed. “And when you get the guns mounted I shall be glad to make an official test. You understand,” he went on, to Tom, “that we are vitally interested in the guns, since we now have many aircraft that can be used purely for scouting purposes. What we want is something for offense, a veritable naval terror of the seas.”
“I understand,” Tom answered. “And I am going to begin work on mounting the guns at once. I am going to use the Newton recoil check,” he added. “Ned, here, is responsible for that.”
“Is that so?” asked the lieutenant, as Tom clapped his chum on the back.
“Yes, that’s his invention.”
“Oh, it isn’t anything of the sort,” Ned objected. “I just—”
“Yes, he just happened to solve the problem for me!” interrupted Tom, as he told the story of the door-spring.
“A good idea!” commented Lieutenant Marbury.
Tom then briefly described the principle on which his aerial warship would work, explaining how the lifting gas would raise it, with its load of crew, guns and explosives, high into the air; how it could then be sent ahead, backward, to either side, or around in a circle, by means of the propellers and the rudders, and how it could be raised or lowered, either by rudders or by forcing more gas into the lifting bags, or by letting some of the vapor out.
And, while this was being done by the pilot or captain in charge, the crew could be manning the guns with which hostile airships would be attacked, and bombs dropped on the forts or battleships of the enemy.
“It seems very complete,” observed the lieutenant. “I shall be glad when I can give it an official test.”
“Which ought to be in about a week,” Tom said. “Meanwhile I shall be glad if you will be my guest here.”
And so that was arranged.
Leaving Ned and the lieutenant to entertain each other, Tom went to see the mechanics who had applied for places. He found them satisfactory and engaged them. One of them had worked for him before. The other was a stranger, but he had been employed in a large aeroplane factory, and brought good recommendations.
There followed busy days at the Swift plant, and work was pushed on the aerial warship. The hardest task was the mounting of the guns, and equipping them with the recoil check, without which it would be impossible to fire them with the craft sailing through the air.
But finally one of the big guns, and two of the smaller ones were in place, with the apparatus designed to reduce the recoil shock, and then Tom decided to have a test of the Mars.
“Up in the air, do you mean?” asked Ned, who was spending all his spare time with his chum.
“Well, a little way up in the air, at least,” Tom answered. “I’ll make a sort of captive balloon of my craft, and see how she behaves. I don’t want to take too many chances with that new recoil check, though it seems to work perfectly in theory.”
The day came when, for the first time, the Mars was to come out of the big shed where she had been constructed. The craft was not completed for a flight as yet, but could be made so in a few days, with rush work. The roof of the great shed slid back, and the big envelope containing the buoyant gas rose slowly upward. There was a cry of surprise from the many workmen in the yard, as they saw, most of them for the first time, the wonderful new craft. It did not go up very high, being held in place with anchor ropes.
The sun glistened on the bright brass and nickel parts, and glinted from the gleaming barrels of the quick-firing guns.
“That’s enough!” Tom called to the men below, who were paying out the ropes from the windlasses. “Hold her there.”
Tom, Ned, Lieutenant Marbury and Mr. Damon were aboard the captive Mars.
Looking about, to see that all was in readiness, Tom gave orders to load the guns, blank charges being used, of course.
The recoil apparatus was in place, and it now remained to see if it would do the work for which it was designed.
“All ready?” asked the young inventor.
“Bless my accident insurance policy!” exclaimed Mr. Damon. “I’m as ready as ever I shall be, Tom. Let ’em go!”
“Hold fast!” cried Tom, as he prepared to press the electrical switch which would set off the guns. Ned and Lieu
tenant Marbury stood near the indicators to notice how much of the recoil would be neutralized by the check apparatus.
“Here we go!” cried the young inventor, and, at the same moment, from down below on the ground, came a warning cry:
“Don’t shoot, Massa Tom. Don’t shoot! Mah mule, Boomerang—”
But Eradicate had spoken too late. Tom pressed the switch; there was a deafening crash, a spurt of flame, and then followed wild cries and confused shouts, while the echoes of the reports rolled about the hills surrounding Shopton.
CHAPTER X
THE NEW MEN
“What was the matter down there?”
“Was anyone hurt?”
“Don’t forget to look at those pressure gauges!”
“Bless my ham sandwich!”
Thus came the cries from those aboard the captive Mars. Ned, Lieutenant Marbury and Tom had called out in the order named. And, of course, I do not need to tell you what remark Mr. Damon made. Tom glanced toward where Ned and the government man stood, and saw that they had made notes of the pressure recorded on the recoil checks directly after the guns were fired. Mr. Damon, blessing innumerable objects under his breath, was looking over the side of the rail to discover the cause of the commotion and cries of warning from below.
“I don’t believe it was anything serious, Tom,” said the odd man. “No one seems to be hurt.” “Look at Eradicate!” suddenly exclaimed Ned.
“And his mule! I guess that’s what the trouble was, Tom!”
They looked to where the young bank employee pointed, and saw the old colored man, seated on the seat of his ramshackle wagon, doing his best to pull down to a walk the big galloping mule, which was dragging the vehicle around in a circle.
“Whoa, dere!” Eradicate was shouting, as he pulled on the lines. “Whoa, dere! Dat’s jest laik yo’, Boomerang, t’ run when dere ain’t no call fo’ it, nohow! Ef I done wanted yo’ t’ git a move on, yo’d lay down ’side de road an’ go to sleep. Whoa, now!”
But the noise of the shots had evidently frightened the long-eared animal, and he was in no mood for stopping, now that he had once started. It was not until some of the workmen ran out from the group where they had gathered to watch Tom’s test, and got in front of Boomerang, that they succeeded in bringing him to a halt.
Eradicate climbed slowly down from the seat, and limped around until he stood in front of his pet.
“Yo’—yo’re a nice one, ain’t yo’?” he demanded in sarcastic tones. “Yo’ done enough runnin’ in a few minutes fo’ a week ob Sundays, an’ now I won’t be able t’ git a move out ob ye! I’se ashamed ob yo’, dat’s what I is! Puffickly ashamed ob yo’. Go ’long, now, an’ yo’ won’t git no oats dish yeah day! No sah!” and, highly indignant, Eradicate led the now slowly-ambling mule off to the stable.
“I won’t shoot again until you have him shut up, Rad!” laughed Tom. “I didn’t know you were so close when I set off those guns.”
“Dat’s all right, Mass a Tom,” was the reply. “I done called t’ you t’ wait, but yo’ didn’t heah me, I ’spects. But it doan’t mattah, now. Shoot all yo’ laik, Boomerang won’t run any mo’ dis week. He done runned his laigs off now. Shoot away!”
But Tom was not quite ready to do this. He wanted to see what effect the first shots had had on his aerial warship, and to learn whether or not the newly devised recoil check had done what was expected of it.
“No more shooting right away,” called the young inventor. “I want to see how we made out with the first round. How did she check up, Ned?”
“Fine, as far as I can tell.”
“Yes, indeed,” added Lieutenant Marbury. “The recoil was hardly noticeable, though, of course, with the full battery of guns in use, it might be more so.”
“I hope not,” answered Tom. “I haven’t used the full strength of the recoil check yet. I can tune it up more, and when I do, and when I have it attached to all the guns, big and little, I think we’ll do the trick. But now for a harder test.”
The rest of that day was spent in trying out the guns, firing them with practice and service charges, though none of the shells used contained projectiles. It would not have been possible to shoot these, with the Mars held in place in the midst of Tom’s factory buildings.
“Well, is she a success, Tom?” asked Ned, when the experimenting was over for the time being.
“I think I can say so—yes,” was the answer, with a questioning look at the officer.
“Indeed it is—a great success! We must give the Newton shock absorber due credit.”
Ned blushed with pleasure.
“It was only my suggestion,” he said. “Tom worked it all out.”
“But I needed the Suggestion to start with,” the young inventor replied.
“Of course something may develop when you take your craft high in the air, and discharge the guns there,” said the lieutenant. “In a rarefied atmosphere the recoil check may not be as effective as at the earth’s surface. But, in such case doubtless, you can increase the strength of the springs and the hydrostatic valves.”
“Yes, I counted on that,” Tom explained. “I shall have to work out that formula, though, and be ready for it. But, on the whole, I am pretty well satisfied.”
“And indeed you may well feel that way,” commented the government official.
The Mars was hauled back into the shed, and the roof slid shut over the craft. Much yet remained to do on it, but now that Tom was sure the important item of armament was taken care of, he could devote his entire time to the finishing touches.
As his plant was working on several other pieces of machinery, some of it for the United States Government, and some designed for his own use, Tom found himself obliged to hire several new hands. An advertisement in a New York newspaper brought a large number of replies, and for a day or two Tom was kept busy sifting out the least desirable, and arranging to see those whose answers showed they knew something of the business requirements.
Meanwhile Lieutenant Marbury remained as Tom’s guest, and was helpful in making suggestions that would enable the young inventor to meet the government’s requirements.
“I’d like, also, to get on the track of those spies who, I am sure, wish to do you harm,” said the lieutenant, “but clues seem to be scarce around here.”
“They are, indeed,” agreed Tom. “I guess the way in which we handled that fire in the red shed sort of discouraged them.”
Lieutenant Marbury shook his head.
“They’re not so easily discouraged as that,” he remarked. “And, with the situation in Europe growing more acute every day, I am afraid some of those foreigners will take desperate measures to gain their ends.”
“What particular ends do you mean?”
“Well, I think they will either try to so injure you that you will not be able to finish this aerial warship, or they will damage the craft itself, steal your plans, or damage some of your other inventions.”
“But what object would they have in doing such a thing?” Tom wanted to know. “How would that help France, Germany or Russia, to do me an injury?”
“They are seeking to strike at the United States through you,” was the answer. “They don’t want Uncle Sam to have such formidable weapons as your great searchlight, the giant cannon, or this new warship of the clouds.”
“But why not, as long as the United States does not intend to go to war with any of the foreign nations?” Tom inquired.
“No, it is true we do not intend to go to war with any of the conflicting European nations,” admitted Lieutenant Marbury, “but you have no idea how jealous each of those foreign nations is of all the others. Each one fears that the United States will cease to be neutral, and will aid one or the other.”
“Oh, so that’s’ it?” exclaimed Tom.
“Yes, each nation, which may, at a moments notice, be drawn into a war with one or more rival nations, fears that we may throw in our lot with its enemies.”
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sp; “And, to prevent that, they want to destroy some of my inventions?” asked Tom.
“That’s the way I believe it will work out. So you must be careful, especially since you have taken on so many new men.”
“That’s so,” agreed the young inventor. “I have had to engage more strangers than ever before, for I am anxious to get the Mars finished and give it a good test. And, now that you have mentioned it, there are some of those men of whom I am a bit suspicious.”
“Have they done anything to make you feel that way?” asked the lieutenant.
“Well, not exactly; it is more their bearing, and the manner in which they go about the works. I must keep my eye on them, for it takes only a few discontented men to spoil a whole shop full. I will be on my guard.”
“And not only about your new airship and other inventions,” said the officer, “but about yourself, personally. Will you do that?”
“Yes, though I don’t imagine anything like that will happen.”
“Well, be on your guard, at all events,” warned Lieutenant Marbury.
As Tom had said, he had been obliged to hire a number of new men. Some of these were machinists who had worked for him, or his father, on previous occasions, and, when tasks were few, had been dismissed, to go to other shops. These men, Tom felt sure, could be relied upon.
But there were a number of others, from New York, and other large cities, of whom Tom was not so sure.
“You have more foreigners than I ever knew you to hire before, Tom,” his father said to him one day, coming back from a tour of the shops.
“Yes, I have quite a number,” Tom admitted. “But they are all good workmen. They stood the test.”
“Yes, some of them are too good,” observed the older inventor. “I saw one of them making up a small motor the other day, and he was winding the armature a new way. I spoke to him about it, and he tried to prove that his way was an improvement on yours. Why, he’d have had it short-circuited in no time if I hadn’t stopped him.”
The Tom Swift Megapack Page 222