"There"s some one in here all right!" Sandy explained. "Did you hear the call of the pack a minute ago? There are Boy Scouts in there, and what we hear are the signals of the Wolf Patrol."
"That"s right!" cried Tommy excitedly. "That"s right!"
CHAPTER III
WHO CUT THE STRING
"Do you suppose he would understand the call of the Beaver Patrol?"
asked Sandy. "I"m going to try him, anyway!"
The boy brought his hands together in imitation of the slap of a beaver"s tail on the water, and listened for some reply.
"He"ll understand that if he"s up on Boy Scout literature," suggested Sandy. "He ought to be wise to the signs of the different patrols if he"s a good Boy Scout."
There was a short silence, broken only by the constant drip of the water in an adjoining chamber and then the call of the pack came again, clearly, sharply and apparently only a short distance away.
"What did Mr. Canfield call those two boys we are looking after?"
asked Sandy, after waiting a short time for the repet.i.tion of the sound.
"Jimmie Maynard and d.i.c.k Thompson," replied Tommy.
Sandy threw out his chest and cried out at the top of his lungs.
"h.e.l.lo, Jimmie! h.e.l.lo, d.i.c.k!"
The lad"s voice echoed dismally throughout the labyrinth of pa.s.sages, but there was no other reply. Tommy and Sandy gave the call of the Beaver Patrol repeatedly, but the call of the Wolf pack was heard no more.
"I"ll bet it"s some trick!" exclaimed Sandy after waiting in the chamber for a long time in the hope of hearing another call from the boys who were hidden somewhere behind the cribbing.
"What do you mean by trick?" demanded Tommy.
"Why, I mean that some of the breaker boys, out of work because of the stoppage of operations, may have sneaked into the mine on purpose to produce the impression that there are ghosts here."
"But ghosts wouldn"t be giving signals of the Wolf Patrol, would they?" asked Tommy.
"Not unless they were Scouts," replied the other.
"Oh, well, of course the kids would want to test us, wouldn"t they, seeing that we were only boys?"
"Well, we"ve discovered one thing by coming down here," said Tommy, "and that is that there really are people in the mine who have no business here."
"Then we may as well go back to bed," advised Sandy.
"Do you know how many corners we"ve turned since we came in here?"
asked Tommy.
"About a thousand, I guess," replied Sandy.
"Yes, and we"d have a fine old time getting out if you hadn"t brought that ball of twine!"
"Tell you what we"ll do," Sandy said, as the boys turned their faces down the gangway, "we"ll pa.s.s around the next shoulder of rock and then shut off our lights. Perhaps, the kids who gave the cry of the pack in there will then show their light again."
"That"s a good idea, too!"
The boys came at length to a brattice, which is a screen, of either wood or heavy cloth, set up in a pa.s.sage to divert the current of air to a bench where workmen are engaged, and dodged down behind it, after turning off their lights, of course,
"Now, come on with your old light," whispered Tommy.
As if in answer to the boy"s challenge, the light showed again, apparently but a few yards way from their hiding place.
A moment later the call of pack sounding louder than before, rang through the pa.s.sage. The boys sprang to their feet and switched on their lights.
"Why don"t you come out and show yourselves?" shouted Tommy.
"I don"t believe you"re Scouts at all!" declared Sandy.
There was no answer. The boys could hear the drip of water and the purring of the current as it crept into a lower gang-way, but that was all.
"That settles it for tonight!" exclaimed Tommy. "I"m not going to hang around here waiting for Boy Scouts who don"t respond to signals!"
"That"s me!" agreed Sandy. "We"ll go to bed and think the matter over. There may be some way of trapping those fellows."
"Suppose it should be Jimmie Maynard and d.i.c.k Thomson?" asked Tommy.
"Then we"d have the case closed up in a jiffy!" was the reply.
Before leaving that particular chamber, Tommy selected a large round piece of "Gob," placed it in the center of the open s.p.a.ce, and laid another small piece of shale on top of it.
"What are you doing that for?" demanded Sandy.
"Don"t you know your Indian signs?" demanded the boy. "This means, "this is the trail." Now I"ll put one stone to the right and that will tell these imitation Boy Scouts to turn to the right if they want to get out."
"I guess they can get out if they want to," suggested Sandy.
Thirty or forty feet further on, where, following the string, the boys turned again, this time to the left, Tommy laid another signal which showed the direction to be taken.
"There," he said with a grin, "we"ve started them on the right path.
If they don"t want to follow it, that isn"t our fault!"
"We must be getting pretty near the shaft," Sandy said, after the boys had walked for nearly half an hour on the backward track.
"Pull on your string," suggested Tommy, "and see if it stiffens up like only a short length of it remained out."
Sandy did as requested, and then dropped to the floor with his searchlight laid along the extension of the cord.