They packed up their few belongings, mostly cooking pots and pans, and marched out of the valley to the village at Rimac.
And so the strike was broken.
The reappearance of the missing men, in better health and spirits than when they went away, acted like magic. The other men, who had missed their wages, crowded back into the shaft, and the sounds of picks and shovels were heard again in the tunnel.
Whether the missing ones told the real story, or whether they made up some tale to account for their absence, Tom and his friends could not learn. Nor did the bearded man (if he it were who had helped in the plot), nor any representative of Blakeson & Grinder appear. The work on the tunnel was resumed as if nothing had happened. But Tom arranged a bright light so it would reflect on the spot in the roof where the moving rock was, so that if the evil face of the bearded man, or of Waddington, appeared there again, it would quickly be seen. A search of the neighborhood, and diligent inquiries, failed to disclose the presence of any of the plotters.
And then, as if Fate was not making it hard enough for the tunnel contractors, they encountered more trouble. It was after Tom had set off a big blast that Tim Sullivan, after inspecting what had happened, came out to ask.
"I soy, Mr. Swift, why didn"t yez use more powder?"
"More powder!" cried Tom. "Why, this is the most I have ever set off."
"Then somethin"s wrong, sor. Fer there"s only a little rock down. Come an" see fer yersilf."
Tom hastened in. As the foreman had said, the effect of the blast was small indeed. Only a little rock had been shaled off. Tom picked up some of this and took it outside for examination.
"Why, it"s harder than the hardest flint we"ve found yet," he said.
"The powder didn"t make any impression on it at all. I"ll have to use terrific charges."
This was done, but with little better effect. The explosive, powerful as it was, ate only a little way into the rock. Blast after blast had the same poor effect.
"This won"t do," said Job t.i.tus, despairingly, one day. "We aren"t making any progress at all. There"s a half mile of this rock, according to my calculations, and at this rate we"ll be six months getting through it. By that time our limit will be up, and we"ll be forced to give up the contract What can we do, Tom Swift?"
Chapter XXI
A New Explosive
The young inventor was idly handling some pieces of the very hard rock that had cropped out in the tunnel cut. Tom had tested it, he had pulverized it (as well as he was able), he had examined it under the microscope, and he had taken great slabs of it and set off under it, or on top of it, charges of explosive of various power to note the effect.
But the results had not been at all what he had hoped for.
"What"s to be done, Tom?" repeated the contractor.
"Well, Mr. t.i.tus," was the answer, "the only thing I see to do is to make a new explosive."
"Can you do it, Tom?"
The reply was characteristic.
"I can try."
And in the days that followed, Tom began work on a new line. He had brought from Shopton with him much of the needful apparatus, and he found he could obtain in Lima what he lacked.
A message to his father brought the reply that the new ingredients Tom needed would be shipped.
"The kind of explosive we need to rend that very hard rock," the young inventor explained to the t.i.tus brothers, "is one that works slowly."
"I thought all explosions had to be as quick as a flash," said Walter.
"Well, in a sense, they do. Yet we have quick burning and slow-burning powders, the same as we have fuses. A quick-burning explosive is all right in soft rock, or in soil with rock and earth mingled. But in rock that is harder than flint if you use a quick explosive, only the outer surface of the rock will be scaled off.
"If you take a hammer and bring it down with all your force on a hard rock you may chip off a lot of little pieces, or you may crack the rock, but you won"t, under ordinary circ.u.mstances, pulverize it as we want to do in the tunnel.
"On the other hand, if you take a smaller hammer, and keep tapping the rock with comparatively gentle blows, you will set up a series of vibrations, that, in time, will cause the hard rock to break up into any number of small pieces.
"Now that is the kind of explosive I want--one that will deal a succession of constant blows at the hard rock instead of one great big blast."
"Can you make it, Tom?"
"Well, I don"t know. I"ll do the best I can."
From then on Tom was busy with his experiments.
Work on the tunnel did not cease while he was searching for a new explosive. There was plenty of the old explosive left and charges of this were set off as fast as holes could be drilled to receive it. But comparatively little was accomplished. Sometimes more rock would be loosed than at others, and the native laborers, now seemingly perfectly contented, would be kept busy. Again, when a heavy blast would be set off hardly a dozen dump cars could be filled.
But the work must go on. Already the time limit was getting perilously close, and the contractors did not doubt that their rivals were only waiting for a chance to step in and take their places.
Nothing more had been seen or heard of the bearded man, Waddington, or Blakeson & Grinder. But that the rival firm had not given up was evidenced by the efforts made in New York to cripple, financially, the firm in which Tom was interested. In fact, at one time the t.i.tus brothers were so tied up that they could not get money enough to pay their men. But Tom cabled his father, who was quite wealthy, and Mr.
Swift loaned the contractors enough to proceed with until they could dispose of some securities.
It might be mentioned that Tom was to get a large sum if the tunnel were completed on time, so it was to his interest and his father"s, to bring this about if he could.
Tom kept on with his powder experiments. Mr. Damon helped him, for that gentleman had succeeded in putting the affairs of the wholesale drug business on a firm foundation, and there was no more trouble about getting the supplies of cinchona bark to market. The natives seemed to have taken kindly to the eccentric man, or perhaps it was the reputation of Tom Swift and his electric rifle that induced them to work hard.
It must not be supposed that Professor b.u.mper was idle all this while.
He came and went at odd times, accompanied by his little retinue of Indians, a guide and a native cook. He would come back to the tunnel camp, where he made his headquarters, travel stained, worn and weary, with disappointment showing on his face.
"No luck," he would report. "The hidden city of Pelone is still lost."
Then he would retire to his tent, to pour over his note-books, and make a new translation of the inscription on the golden plates. In a day or so, refreshed and rested, he would prepare for another start.
"I"ll find it this time, surely!" he would exclaim, as he marched off up the mountain trail. "I have heard of a new valley, never before visited by a white man, in which there are some old ruins. I"m sure they must be those of Pelone."
But in a week or so he would come back, worn out and discouraged again.
"The ruins were only those of a native village," he would say. "No trace of an ancient civilization there."
The professor took little or no interest in the tunnel, though he expressed the hope that Tom and his friends would be successful. But industrial pursuits had no charm for the scientist. He only lived to find the hidden city which was to make him famous.
He heard the story of the queer shaft leading down into the bore under the mountain, and, for a time, hoped that might be some clue to the lost Pelone. But, after an examination, he decided it was but the shaft to some ancient mine which had not panned out, and so had been abandoned after having been fitted with a balanced rocky door, perhaps for some heathen religious rite.
There seemed to be no further trouble among the Indian tunnel workers.
Those who had disappeared--who had, seemingly, gone willingly up the knotted rope to hide themselves in the valley--kept on with their work.