Bob Hubbard had been away from the Kenniston farm-house nearly half an hour when Ralph and George left it, but the latter was so well acquainted with the country that he did not need any guide to the cabin, and could not have had one, had he so desired, for Bob was far too cautious to be seen leading any one to his base of operations.

It was well known by the owners of the torpedo patents that Robert Hubbard was the most skillful of all the moonlighters, and whenever he was seen traveling toward any of the wells that were being bored, he was followed, but, thanks to the fleetness of his horses, he had never been seen at his work by any one who would inform on him.

Bob believed, as did a great many, that the firm holding the patent had no legal right to prevent any one from exploding nitro-glycerine by the means of a percussion cap placed in the top of a tin shell or cartridge. Several cases were before the courts undecided, and until a decision was reached, the owners of the patent would do all in their power to prevent any one from interfering in the business which they proposed to make a monopoly. Therefore, when Bob went about his work, he did so with quite as much mystery as if he had been engaged in some decidedly unlawful act.

The ride from Sawyer, among the mountains, was quite as rough a one as that from Bradford, and Ralph found that he had about as much as he could attend to in keeping the guns, fishing-rods and himself in the carriage, without attempting to carry on any extended conversation with his friend. It was, therefore, almost in silence that the two rode along until George turned the horses abruptly from the main road into the woods, saying, as he did so:

"If I am not mistaken, this path will lead us directly to Bob's headquarters."

He was not mistaken, for before they had ridden a mile into the woods, they emerged into a clearing, in the midst of which stood a small log-house and stable.

Instead of windows, the hut had stout plank shutters, which prevented any one from looking in, even if they did prevent the occupants from gazing out, and the door had more the appearance of having been made to resist an attack than simply to keep the wind or cold out.

The stable was in keeping with the hut, so far as an appearance of solidity went; and as its one door was closely shut, with no bars or locks on the outside, one could fancy that when it was occupied, a guard remained on the inside, where the fastenings of the door evidently were.

"I guess we have got here too soon," said Ralph, as George stopped the horses in front of the hut, without any signs of life having been seen.

"There is a smoke from the chimney," said George, as he pointed to the clumsy affair of mud and sticks from which a thin, blue curl of smoke could be dimly seen, "and if they are ready to let us in, we shall soon see some one."

The two sat patiently in the carriage several moments, and at the end of that time the door of the hut was opened by a young man standing in the doorway, to whom George said:

"Well, Dick, hasn't Bob got here yet?"

"Yes, he's here; but we didn't open the door at first because we were not sure but that you had been followed." Then turning toward the barn, the young man shouted, "Come out here, Pete, and take care of these horses!"

In response to this demand the stable door was opened as cautiously as if the man behind it feared a dozen were ready to pounce upon him, and then, much as if he were unfolding himself, a tall negro came out, leading the horses away without speaking, almost before Ralph and George had time to leap to the ground.

"Get into the hut as quickly as possible," George said to Ralph; and as the three entered, the door was securely barred behind them with two heavy beams that would have resisted almost any ordinary force that might have been used against them.

The hut boasted of but one room, in which were to be seen piles of blankets that had evidently been used as beds, cooking utensils, provisions, sheets of tin, tools such as are used by tinsmiths, and, in fact, as varied an assortment of goods as could well have been gathered into so small a compass.

In one corner of the room the floor of earth had been excavated, until a space about six feet square and four deep had been formed, and into this excavation was packed a number of square tin cans, which Ralph felt certain contained that powerful agent, nitro-glycerine.

Bob was at work soldering together a long tin shell, about six inches in diameter and fully ten feet long, and he called out, as his friends entered:

"Come right in. Don't be afraid that you will be shot at, for we drop all that kind of business here for fear we might all go up together. This, Mr. Gurney, is the moonlighters' cabin, and I am free to confess that it is not the most cheerful place in the world."

"I don't find as much fault with the cabin as I do with what you keep stored in those innocent-looking tin cans," replied Ralph, as he seated himself on a pile of blankets at a respectful distance from the glycerine.

"Oh, that's harmless enough so long as you leave it alone!" replied Bob, carelessly, and then as he resumed his work of soldering, he asked: "Did you see anything of Jim as you came in?"

"No; where is he?"

"Out by the road somewhere. We heard that our particular friends in town had got wind of the fact that we were going to put in a charge to-night, so Jim is doing guard duty outside, leaving Dick Norton and I to do the tinker's work. We expected to have gotten our shells all made in town; but they are looking out so sharp for us just now that it was entirely too much of a risk to bring them out here."

"How did they learn that you were going to work to-night?" asked George.

"That's more than I can say, unless old Hoxie was fool enough to let it out that we were going to shoot his well for him," replied Bob, working savagely with the soldering iron, much as if he would have been pleased had he been using it on Mr. Hoxie's too ready tongue.

"Do you anticipate much trouble?" asked Ralph, with just a shade of anxiety, beginning to realize that it would not be the most pleasant thing in the world to commence his vacation by being arrested as a moonlighter.

"That's just what I can't say. We may have it, and we may not; but there's one thing certain, and that is that I'll shoot that well if I don't get back to the Kenniston farm for three months."

"I don't believe that they are even looking for us. They think we went out of the business two weeks ago," said Dick Norton, as he, in a very unworkmanlike manner, attempted to aid Bob. "You see, Jim is nervous, and the least thing frightens him."

"Something has startled him, at all events!" exclaimed Bob, running to the door as a low, quick whistle was heard from the outside.

Dick, despite the rather contemptuous way in which he had spoken, also appeared to think something serious had happened, for he joined Bob at the door, looking very serious as both of them quickly unfastened the bars, opening the door just as a young man ran in from the woods, breathless and excited.

"What is it, Jim? What has happened?" asked Bob, replacing the heavy bars instantly the newcomer was inside the building.

"Newcombe and five men have just turned into the path, coming down here as if they knew just what they should find."

For a moment Bob and Dick were silent, and Ralph had an opportunity to ask George:

"Who is Newcombe?"

"A man in the employ of the owners of the patent, and one who has threatened several times to secure the arrest of Bob."

Dick's first act, after he fully realized what Jim had said, was to cover the fire, at which they had been soldering, with ashes, in order to prevent any smoke from escaping through the chimney, and by that time Bob had recovered all his presence of mind.

"Even if they have at last found the hut, they will be puzzled to get into it, or to get us out," he said, as he noted the fastenings of the window-shutters, and uncovered a small aperture which served as a loop-hole through which everything that occurred outside could be seen.

"You ought to have warned Pete," said George, not feeling remarkably well pleased at the chance of being besieged as a moonlighter, but yet anxious that his friends should elude arrest where the cartridges and explosive fluid would be sufficient proof against them.

"There is no need of that," replied Bob. "He wouldn't show himself under any circumstances unless we called him, and from the loft of the stable he can see all that is going on."

Ralph was the most uncomfortable of the party. Not being so familiar with the doings of the moonlighters, nor acquainted with the general feeling of the public against them, the idea of being thus hunted like a criminal was very repugnant to him.

It was as if his companions were engaged in some crime, instead of simply infringing a patent, the legality of which had not been fully tested, and, if he could have had his choice, he would have been miles away from that spot just then.

"There they come!" exclaimed Bob from his post of observation, and, looking out for a moment, Ralph saw six men riding into the clearing directly toward the house.

Almost before he had time to regain his seat, and just as Bob held up his hand as a signal for silence, a knock was heard at the door, as if some one was pounding with the butt-end of a whip.

No one made any reply, and it seemed to Ralph as if he could hear the pulsations of his own heart, so oppressive was the silence.

Again the summons was repeated, and a gruff voice cried:

"Open the door a moment. I wish to speak with Mr. Robert Hubbard."

Then there was a long silence, and, seeing the look of anxiety on Ralph's face, George said, in a low whisper:

"Don't look so distressed, my boy. Those men have got no more right to enter here than you have to go into another man's dwelling. If they should succeed in getting in, however, they would find sufficient to prove that Bob was about to infringe their patent; but, as it is, they have no authority to do anything, although Bob will hardly get a chance to shoot the Hoxie well to-night."

"That's just what I will do," whispered Bob, who had heard George's remark. "I will put in that charge if they camp where they are all night."

The men on the outside waited some moments in silence, and then the request was repeated, while at the same time footsteps could be heard as if some of them had gone toward the stable.

"They might easily batter in one of the windows," said Ralph, as the pounding at the door was continued.

"They would hardly try that plan," replied George, with a meaning smile. "There are a hundred or two quarts of nitro-glycerine stored here, needing only the necessary concussion to explode them. Those men know quite as well as we do how unpleasant such liquid may become, and I assure you that they will strike no very heavy blows on the building."

It was a singular position for any one to be in, and Ralph was far from being comfortable in his mind, as he awaited the result of this visit to the cabin of the moonlighters.

CHAPTER IV.
A REGULAR SIEGE

Ralph, simply a visitor to the cabin of the moonlighters, felt far more uncomfortable than did his hosts, to whom alone there was any danger.

As the party waited silently for any move by those outside, Ralph had plenty of time to review his own position, and this review was far from pleasant or reassuring.

In that section of the country the fact of being arrested as a moonlighter did not imply either disgrace or crime; but in Ralph's home, where nothing was known of such an industry, save when occasionally a newspaper item was read but not understood, the news of his arrest while trying illegally to "shoot" a well, would cause as much consternation and sorrow as if he had attempted to shoot a man. It was far from being a pleasant beginning to his vacation, and he would have been much better satisfied with himself if he had not made any attempt to penetrate the mysteries of the moonlighters' dangerous calling.

While these uncomfortable thoughts were presenting themselves to Ralph, Bob Hubbard was standing on a rudely-constructed table, in order that he might keep a watch upon Newcombe and his men, and from time to time he whispered to his companions of that which he saw.

"They've got tired trying to find out anything at the stable, and now they're coming this way. If we keep perfectly quiet they will begin soon to believe that no one is here, and then, very likely, they will go away."

It was in the highest degree necessary that these men should be thrown off the scent if possible, and each one in the hut remained motionless as statues, but, as was shown a moment later, their silence was fruitless, owing to the defective construction of their furniture.

"Now they are gathering close around the door," continued Bob, from his post of observation; and then, fearing he might betray himself even through the loop-hole, he began cautiously to descend.

It was as if his very efforts to move without noise hastened the catastrophe he was trying to avert, for as he started to lower himself from the table, the entire structure gave way, and he came to the floor with such a crash as could have been heard many yards away.

There was no need of question as to whether Bob's downfall had been heard by those outside, for at the moment a low, involuntary cry of triumph was heard, which did not detract from the unfortunate moonlighter's discomfiture. Had Bob cried out his name he could not have proclaimed his presence any more plainly, and as he disentangled himself from amid the wreck of the table, his face spoke eloquently the anger he felt, either at his own carelessness or the weakness of the table.

"It's all up now," said Jim, despondently. "There was a chance that they might get tired in time, and go away; but now they will stay here until they see us leave."

"Well, let them stay," said Bob, savagely. "I have come here to get ready to shoot the Hoxie well, and I'll do it before I go home again."

"Perhaps you will, and perhaps you won't," said Jim, doubtingly; "but if my opinion's worth anything, you won't."

Bob made no reply to this; but attacked the tin cartridges on which he had been working with an energy that told plainly of his determination; although how it might be possible for him to do more than to get ready for the work, no one could imagine. He no longer tried to be silent, but made so much bustle with his work that George said:

"What makes you so careless, Bob? Even if they did hear you when you fell, there is no reason why you should advertise the fact that you are making cartridges."

"What difference does it make what they hear now?" asked Bob, not even looking up from his work as he spoke. "Do you fancy that Newcombe, finding us here, does not know just as well as we do what there is inside here? If we remain quiet, he will say to himself that we are all ready for the shot, and only waiting for him to get out of the way before we let it off. If we work, he will know no more, and we may as well take things comfortable."

"It isn't any use for us to try to do anything," said Dick, disconsolately. "Newcombe will stay right where he is until we go out, and the best thing we can do is give the thing up for a while."

"Yes," interrupted Jim, "let's go home, and wait until we can give him the slip and get out again."

"I'll do nothing of the kind," replied Bob, doggedly. "I agreed to shoot Hoxie's well to-night, and I'm going to do it."

"You can't without Newcombe's seeing you, and you know that your arrest would follow as soon after that as he could get out a warrant," said George, thinking it was high time for him to interfere with advice. "They have never been able to get any proof against you yet, and you don't want to give them the chance now just through spite."

"I'm not going to give them the chance," said Bob, calmly. "I am going to take what I need out of this place while they are guarding it, and without their seeing me. If any of you fellows are afraid, and want to go home, you know how to get there; but I am going to stay, and do just as I have said."

Bob could have used no better argument, if he had been anxious to have his companions remain with him, than when he proposed they should go home if they were afraid. Much as Ralph would have liked to, he did not think of leaving, when to do so was to be considered proof that he was afraid, and he, as well as the others, settled themselves down to await the result of Bob's plan, whatever it might be.

Those on the outside, however, were not as contented in their waiting, as they showed in a short time, when Newcombe's voice could be heard addressing those whom he believed he had "run to earth."

"Say, boys!" he cried, "you know very well that I shall stay here until you come out, and the best thing you can do is to give the job up for a while, for I promise you that you will get no chance to do the work this time."

It was quite evident that Mr. Newcombe had no more desire to remain outside of the hut on guard than Ralph and George had to remain inside, and that he was anxious to put a speedy end to what had every appearance of being a long job. It was plain to be seen that he neither understood nor relished this singular behavior on the part of those whom he had no authority to arrest until they had committed some overt act, and that he was anxious to bring the case to an issue at once.

The others looked at Bob, expecting he would make some reply to the proposition, but he made no sign that he had even heard what had been said. He worked industriously at the long tin tubes, neither speaking nor looking up.

"You know that I have got wind of what you are going to do to-night," continued Newcombe, from the outside, "and you know that I shall stay right here until you leave; so what's the use of acting so childishly about it? Come right out like men, and begin the thing over at some other time."

Even Ralph could understand that, in his eagerness to be away, Mr. Newcombe was making a great mistake in thus pleading with those over whom he could have no control until after their work was done, and Dick's face lightened wonderfully as he began to hope the "torpedo detective," as Newcombe was called, might tire of his watching and go away.

All the inmates of the hut appeared to share the same hope, and Jim at once began to replace the broken table with some empty boxes, in order that he might have access to the loop-hole.

"What will be the result of all this?" Ralph asked of George, as the two seated themselves comfortably in one corner of the room, where they would at the same time be out of Bob's way, and see all that was going on.

"That I can't say. It may be forty-eight hours before Bob gives up the scheme he has evidently formed, and in the meanwhile here we are prisoners, for we cannot ask to leave the hut until the others do. It promises to be a tedious thing for us; but you remember that you wished there might be some excitement other than the mere shooting of the well."

"Yes," replied Ralph, with a laugh, "I remember that I was foolish enough to make some such remark, and I am in a fair way to get all I wanted."

By this time Jim had built up a shaky sort of a platform, by which he was enabled to climb to the loop-hole, and he at once gave the result of his outlook to his companions.

"They are unharnessing the horses," he cried, in a tone of disappointment; for he had almost persuaded himself that they would leave the place at once. "Newcombe's team is directly in front, and the other two are drawn up on either side, about fifty yards from it. They are preparing for a regular siege."

"Which is the most fortunate thing for us that could have happened," said Bob, contentedly.

"Why? I don't see how we can do anything when they are all ready to follow us the moment we show ourselves out of doors," said Dick.

"If you can't, I can," replied Bob, working leisurely at his cartridges, and with as much precision as if the "torpedo detectives" were miles away.

"Tell me what you intend to do."

"I'll show you when everything is ready, Dick, and not before. You have said that we couldn't do anything while they were here; therefore, whatever my plan may be, it is better than giving the whole thing up. Now, if your fears will permit, suppose you take hold and help me while Jim watches our friends outside."

It was as if Dick understood for the first time that while they were bewailing their fate that Newcombe should have found their hiding-place, Bob was working industriously at the task on hand, and he began to help him at once, which employment had the effect of dispelling his fears in a wonderful degree.

"Three of the men are watching the house from the front, while Newcombe and the other two are going towards the stable," said Jim; and then he added, excitedly: "I believe that rascal Pete is talking with them, for they are standing there now, looking up towards the roof as if they saw or heard some one."

Dick was disposed to leave his work at this startling announcement but Bob's industry had a quieting effect upon him, and he continued in his office of helper, although with evident mental anxiety.

"Now they have called one of the other men over, and all four of them are going through the motions of a conversation. Now Newcombe has taken some money out of his pocket, and is holding it up in his hand."

There was a moment of silence in the hut, during which all the boys, even including Bob, awaited in anxiety the result of this evident bribe, and then Jim said, excitedly:

"Pete has shown himself, and is reaching out with the pitch-fork for the money. He is selling us to Newcombe, who will know now exactly what we were going to do."