He gave little further thought to the chance meeting, his mind being busied with speculations as to what he might find in the mysterious alley. The weather was very mild, and he knew the sheet of ice and snow that had covered the ground on his previous visit would not now exist to baffle him. But he did not want to enter the alley until darkness had fallen to offer him concealment, so abated his usual brisk pace to a mere saunter, and took careful note of the att.i.tude of the people he pa.s.sed. The streets were quiet enough, but the faces of the inhabitants were sullen and hostile, and Frank could read enmity in the glances cast at him.
"They love the Americans about as much as they love sunstroke," he meditated. "But it doesn"t matter much what they like, because they"ll take just what"s handed to them. But it"s the lower elements and the revolutionists who are making most of the trouble, and I"m a lot mistaken if their headquarters aren"t in the neighborhood of that blind alley. Well, anyway, I"ll know more about it when I get through my privately conducted explorations this evening."
He stopped in a small restaurant and ordered a light meal. By the time he had finished this it was nearly dark, and he set out for his objective without further delay.
He shortly reached the entrance to the alley, and, after casting a searching glance about him to make sure that he was un.o.bserved, he slipped cautiously into the place.
"It ought to be a lot easier for me to locate that trap door now than it was when I was here with Bart," he thought. "There"s no ice now, and if there is a door, I"ll be bound to find it."
He proceeded cautiously up the alley, taking every precaution to avoid noise, and soon reached the blank wall that had so baffled him and his friends on a previous occasion. He drew a flashlight from his pocket, and when he thought he was close to the place where he and Bart had previously located the door he cautiously played the tiny spot of light over the ground. At first he thought he must be mistaken, as this part of the alley seemed to be like all the rest. But, looking closer, his heart leaped as he made out the outline of a heavy iron ring, lying flat in a recess in the pavement, and almost covered with gravel and dust. So cunningly was it concealed that it would inevitably have escaped observation unless one were actually looking for it.
"There"s a trap door here, all right," he exulted. "Now, I wonder if I can get in, or if it will be fastened from the inside. Here goes to find out."
With the thought, he worked the iron ring loose from the dirt, set himself for the effort, and gave a tentative tug. The door did not give a particle, and he tried again, this time putting every ounce of his strength into the effort. The door gave a little, but with all his strength Frank could not lift it more than an inch or two.
He tried again and again, but with no better result, and at last, to his great disappointment he was forced to give over the attempt for the time being.
"Guess this is more than a one-man job," he thought to himself.
"What I"ll have to do is to bring Bart and Billy here to-morrow night, and I think the three of us can lift the door easily. I"ve made one big step, anyway, for now I know there is really a trap door here, and before we weren"t sure of it."
He pressed the iron ring down into its socket, scattered some earth and gravel over it, and at last satisfied that he had left everything as he had found it and in such a condition as not to arouse suspicion if the secret entrance was used by one of the plotters before he could return, he turned his footsteps toward camp.
CHAPTER XV
A BARE CHANCE
Frank was now convinced that he and his comrades had really chanced on a big secret, and he was eager to get them and get to the heart of the matter. He was greatly disappointed that he had been unable to follow up the adventure that very evening, but with a soldier"s philosophy promised himself better luck the next time, and swung off toward camp with a stride that soon brought him to his destination.
But the Army Boy"s plan for an immediate further investigation of the mysterious alley was destined to have a further setback, for the next day great aeroplane activity started all over the American front, and it was announced that n.o.body would be given leave to visit Coblenz until further notice. It seemed that reports had been received at general headquarters that the rioters, driven out of Coblenz, were gathering in smaller towns throughout the occupied area, and making demonstrations and inflammatory speeches against the American "invaders."
Many aviators were detailed to fly over all the neighboring territory and get information of the movements and numbers of the rioters, so that troops could be sent to the threatened points and suppress the uprisings before they a.s.sumed serious proportions.
Among the aviators detailed to this work was d.i.c.k Lever, and on his return from one of these excursions he sought out his Army Boy friends. For a considerable time he had been detailed to other parts of the occupied territory, but now his headquarters were temporarily near the barracks in which the boys were situated.
So it happened that one evening as Frank, Bart, and Billy were strolling toward the canteen, they were both surprised and delighted to espy the long, athletic figure of their friend. d.i.c.k was no less glad to see them, and everybody for some distance around was apprised of the fact that old comrades had met once more.
"But where"s Tom?" inquired d.i.c.k, after the first burst of enthusiasm was over. "I"m so used to seeing you fellows as a quartette that your sweet voices don"t sound exactly correct as a trio."
The faces of all the boys lengthened at this allusion to their missing friend, and in a few words they explained to d.i.c.k the circ.u.mstances of his sudden disappearance.
"By Jove!" exclaimed d.i.c.k excitedly, when they had finished, "I wouldn"t be a bit surprised if I could put you on his trail."
"What do you mean?" chorused the boys.
"Now, don"t get excited," said d.i.c.k. "What I"m going to tell you may not be of the least importance after all. It"s just this.
While I was reconnoitering over the various camps of the revolutionists, in one of them I was sure I saw a man in an American Army uniform. I was too far up to recognize him even if I had known him, and it might be any American prisoner other than Tom, or it might be a German dressed in an American uniform for spying purposes. Anyway, if I hadn"t been under special rush orders to return as soon as possible, I would have gone down and maybe attempted a rescue, but I had to get back immediately with my information, so couldn"t take any chances."
"But can you give us any idea of the direction of the camp where you saw this man?" inquired Frank. "If we had the least idea where to look for him, you can bet we"d get him away from those renegade Germans, and likely hurt anybody that got in the way, too."
"I"d hate to be the obstacle, myself," grinned d.i.c.k. "But, to get down to business, I can give you a rough idea of the direction and distance, and in addition, I guess I don"t have to tell you that if there"s anything I can do to help, you can count on me to the limit."
The three boys and d.i.c.k shook hands all around as they accepted this offer, and on the spot organized as a committee of ways and means to rescue their missing comrade. d.i.c.k could only tell them approximately where he had seen the man in American uniform, and the Spartacides changed their camps so often in order to escape detection and capture that even this information was of rather doubtful value.
"The best thing I can suggest is this," said d.i.c.k, at last. "I"ve been detailed to try out some new aeroplanes to-morrow, and as long as I take them up and fly them, it doesn"t much matter what direction I go in, provided I don"t go too far. Now, what"s to prevent me from flying a few miles in the direction I last saw this particular bunch of revolutionists, and taking a chance on finding out something more?"
"We"ll appreciate anything you can do in that direction," said Frank. "You"ve given us a clue now, at any rate, and you can bet we won"t be slow in following it up. It"s going to be some problem to get hold of him, but we"ve solved as hard ones before now, and I guess we won"t let this stump us."
"You told it!" said Bart emphatically. "If the Germans couldn"t get one of us while the war was on, it"s a cinch they won"t be able to now when it"s all over. If old Tom"s alive, we"ll rescue him some way."
d.i.c.k Lever described the location of the Spartacides" camp with as much exactness as he could, and even drew a rough map of the surrounding country, marking the place where he had seen the American prisoner with a cross.
The boys thanked him heartily, and then walked back to his section of the camp, as it was getting close to the time for taps, and d.i.c.k had to be back at his quarters by then. On the way they talked over old times, and d.i.c.k promised to visit them again at the first opportunity, and made them promise once more to call on him for help if they thought he could be of service in rescuing Tom. Then they all shook hands, and Bart, Frank, and Billy hurried back to their own quarters, full of excitement over the news that d.i.c.k had brought them and hopes that they would soon have Tom with them again.
But this was not to prove quite as quickly nor easily done as they had antic.i.p.ated, for conditions were so disturbed that small detachments were not permitted to go into the surrounding country lest they should be attacked and overwhelmed by superior forces that might bear them down by sheer force of numbers.
They had to abandon therefore the plan to hunt Tom unaided, and Frank went direct to his lieutenant and told him just what they had learned from d.i.c.k regarding the presence of an American prisoner in the Spartacides" hands and their suspicion that it might possibly be their missing comrade.
To his surprise, he learned that the lieutenant had already received a report from other sources that tallied closely with d.i.c.k"s. It was intolerable that any American should be left a prisoner in the hands of desperate men who might at any moment take his life, and plans were maturing to descend on the place where he was believed to be held. An adequate force would be provided and would set out as soon as possible.
With an inward prayer that the attempt would be made soon, Frank left the lieutenant"s presence and hurried away to tell the good news to Billy and Bart.
CHAPTER XVI
RAISING THE TRAP DOOR
"I hear that a detachment is getting ready to go over to look into that matter of the prisoner that d.i.c.k told us about," said Frank Sheldon, a little later when he and his comrades were coming out from mess.
"I hope we"re slated to go along with it," said Billy eagerly.
"Here comes the corp," remarked Bart. "Let"s ask him. He"ll probably be in charge of it."
As Corporal Wilson approached, the boys intercepted him.
"I can guess what you"re going to ask," he said with a smile; "and I"ll answer it right now. Yes, you fellows are going with the detachment. Plans are making now, but there"s so much doing right here just now that we won"t be able to start until to-morrow."
"To-morrow?" repeated Frank in disappointment, and his feeling was mirrored on the faces of his companions.
"Sorry," said Wilson as he pa.s.sed along, "but orders are orders, and we can"t get off any sooner."
"And who knows what may happen to Tom in the meantime?" said Billy sorrowfully.
"It"s exasperating," said Frank. "It makes me crazy to think of another twenty-four hours going by while we"re doing nothing to help him."