"You know your way about London?" he asked.
"Yes, sir," said Harry.
"I shall have messages for you to carry," said the colonel, then. "Now I want to explain, so that you will understand the importance of this, why you are going to be allowed to do this work. This war has come suddenly—but we are sure that the enemy has expected it for a long time, and has made plans accordingly.
"There are certain matters so important, so secret, that we are afraid to trust them to the telephone, the telegraph—even the post, if that were quick enough! In a short time we shall have weeded out all the spies. Until then we have to exercise the greatest care. And it has been decided to accept the offer of Boy Scouts because the spies we feel we must guard against are less likely to suspect boys than men. I am going to give you some dispatches now—what they are is a secret. You take them to Major French, at Waterloo station."
He stopped, apparently expecting them to speak. But neither said anything.
"No questions?" he asked, sternly.
"No—no, sir," said Dick. "We're to take the dispatches to Major French, at Waterloo? That's all, is it, sir? And then to come back here?"
The colonel nodded approvingly.
"Yes, that's all," he said. "Except for this, Waterloo station is closed to all civilians. You will require a word to pass the sentries. No matter what you see, once you are inside, you are not to describe it. You are to tell no one, not even your parents, what you do or what you see. That is all," and he nodded in dismissal.
They made their way out and back to the railway station. And Dick seemed a little disappointed.
"I don't think this is much to be doing!" he grumbled.
But Harry's eyes were glistening.
"Don't you see?" he said, lowering his voice sothat they could not be overheard. "We know something now that probably even a lot of the soldiers don't know! They're mobilizing. If they are going to be sent from Waterloo it must mean that they're going to Southampton—and that means that they will reach France. That's what we'll see at Waterloo station—troops entraining to start the trip to France. They're going to fight over there. Everyone is guessing at that—a lot of people thought most of the army would be sent to the East Coast. But that can't be so, you see. If it was, they would be starting from King's Cross and Liverpool street stations, not from Waterloo."
"Oh, I never thought of that!" said Dick, brightening.
When they got on the train at Ealing they were lucky enough to get a compartment to themselves, since at that time more people were coming to Ealing than were leaving it. Dick began at once to give vent to his wonder.
"How many of them do you suppose are going?" he cried. "Who will be in command? Sir JohnFrench, I think. Lord Kitchener is to be War Minister, they say, and stay in London. I bet they whip those bally Germans until they don't know where they are—"
"Steady on!" said Harry, smiling, but a little concerned, none the less. "Dick, don't talk like that! You don't know who may be listening!"
"Why, Harry! No one can hear us—we're all alone in the carriage!"
"I know, but we don't know who's in the next one, or whether they can hear through or not. The wall isn't very thick, you know. We can't be too careful. I don't think anyone knows what we're doing but there isn't any reason why we should take any risk at all."
"No, of course not. You're right, Harry," said Dick, a good deal abashed. "I'll try to keep quieter after this."
"I wonder why there are two of us," said Dick, presently, in a whisper. "I should think one would be enough."
"I think we've both got just the same papers tocarry," said Harry, also in a whisper. "You see, if one of us gets lost, or anything happens to his papers, the other will probably get through all right. At least it looks that way to me."
"Harry," said Dick, after a pause, "I've got an idea. Suppose we separate and take different ways to get to Waterloo? Wouldn't that make it safer? We could meet there and go back to Ealing together."
"That's a good idea, Dick," said Harry. He didn't think that their present errand was one of great importance, in spite of what Colonel Throckmorton had said. He thought it more likely that they were being tried out and tested, so that the colonel might draw his own conclusions as to how far he might safely trust them in the future. But he repressed his inclination to smile at this sudden excess of caution on Dick's part. It was a move in the right direction, certainly.
"Yes, we'll do that," he said. "I'll walk across the bridge, and you can take the tube under the river from the Monument."
They followed that plan, and met without incident at the station. Here more than ever the fact of war was in evidence. A considerable space in and near the station had been roped off and sentries refused to allow any to pass who could not prove that they had a right to do so. The ordinary peaceful vocation of the great terminal was entirely suspended.
"Anything happen to you?" asked Harry, with a smile. "I nearly got run over—but that was my own fault."
"No, nothing. I saw Graves. And he wanted to know what I was doing."
"What did you tell him?"
"Nothing. I said, 'Don't you wish you knew?' And he got angry, and said he didn't care."
"It wasn't any of his business. You did just right," said Harry.
They had to wait a few moments to see Major French, who was exceedingly busy. They needed no one to tell them what was going on. At every platform trains were waiting, and, even while theylooked on, one after another drew out, loaded with soldiers. The windows were whitewashed, so that, once the doors of the compartments were closed, none could see who was inside. There was no cheering, which seemed strange at first, but it was so plain that this was a precautionary measure that the boys understood it easily enough. Finally Major French, an energetic, sunburned man, who looked as if he hadn't slept for days, came to them. They handed him the papers they carried. He glanced at them, signed receipts which he handed to them, and then frowned for a moment.
"I think I'll let you take a message to Colonel Throckmorton for me," he said, then, giving them a kindly smile. "It will be a verbal message. You are to repeat what I tell you to him without a change. And I suppose I needn't tell you that you must give it to no one else?"
"No, sir," they chorused.
"Very well, then. You will tell him that trains will be waiting below Surbiton, at precisely ten o'clock to-night. Runways will be built to let themen climb the embankment, and they can entrain there. You will remember that?"
"Yes, sir."
"You might as well understand what it's all about," said the major. "You see, we're moving a lot of troops. And it is of the utmost importance for the enemy to know all about the movement and, of course, just as important for us to keep them from learning what they want to know. So we are covering the movement as well as we can. Even if they learn some of the troops that are going, we want to keep them from finding out everything. Their spy system is wonderfully complete and we have to take every precaution that is possible. It is most important that you deliver this message to Colonel Throckmorton. Repeat it to me exactly," he commanded.
They did so, and, seemingly satisfied, he let them go. But just as they were leaving, he called them back.
"You'd go back by the underground, I suppose," he said. "I'm not sure that you can get through forthe line is likely to be taken over, temporarily, at any moment. Take a taxicab—I'll send an orderly with you to put you aboard. Don't pay the man anything; we are keeping a lot of them outside on government service, and they get their pay from the authorities."
The orderly led them to the stand, some distance from the station, where the cabs stood in a long row, and spoke to the driver of the one at the head of the rank. In a moment the motor was started, and they were off.
The cab had a good engine, and it made good time. But after a little while Harry noticed with some curiosity that the route they were taking was not the most direct one. He rapped on the window glass and spoke to the driver about it.
"Got to go round, sir," the man explained. "Roads are all torn up the straight way, sir. Won't take much longer, sir."
Harry accepted the explanation. Indeed, it seemed reasonable enough. But some sixth sense warned him to keep his eyes open. And at last he decidedthat there could be no excuse for the way the cab was proceeding. It seemed to him that they were going miles out of the way, and decidedly in the wrong direction. He did not know London as well as a boy who had lived there all his life would have done. But his scout training had given him a remarkable ability to keep his bearings. And it needed no special knowledge to realize that the sun was on the wrong side of the cab for a course that was even moderately straight for Ealing.
They had swung well around, as a matter of fact, into a northwestern suburban section, and once he had seen a maze of railway tracks that meant, he was almost sure, that they were passing near Willisden Junction. Only a few houses appeared in the section through which the cab was now racing, and pavements were not frequent. He spoke to Dick in a whisper.
"There's something funny here," he said. "But, no matter what happens, pretend you think it's all right. Let anyone who speaks to us think we're foolish—it'll be easier for us to get away then. Andkeep your eyes wide open, if we stop anywhere, so that you will be sure to know the place again!"
"Right!" said Dick.
Just then the cab, caught in a rutty road where the going was very heavy, and there was a slight upgrade in addition, to make it worse, slowed up considerably. And Dick, looking out of the window on his side, gave a stifled exclamation.
"Look there, Harry!" he said. "Do you see the sun flashing on something on the roof of that house over there? What do you suppose that is?"
"Whew!" Harry whistled. "You ought to know that, Dick! A heliograph—field telegraph. Morse code—or some code—made by flashes. The sun catches a mirror or some sort of reflector, and it's just like a telegraph instrument, with dots and dashes, except that you work by sight instead of by sound. Thatisqueer! Try to mark just where the house is, and so will I."
The cab turned, while they were still looking, and removed the house where the signalling was being done from their line of vision. But in a few moments there was a loud report that startled both scouts until they realized that a front tire had blown out. The driver stopped at once, and descended, seemingly much perturbed. And Harry and Dick, piling out to inspect the damage, started when they saw that they had stopped just outside the mysterious house.
"I'll fix that in a jiffy," said the driver, and began jacking up the wheel. But, quickly as he stripped off the deflated tire, he was not so quick that Harry failed to see that the blow-out had been caused by a straight cut—not at all the sort of tear produced by a jagged stone or a piece of broken glass. He said nothing of his discovery, however, and a moment later he looked up to face a young man in the uniform of an officer of the British territorial army. This young man had keen, searching blue eyes, and very blond hair. His upper lip was closely shaven, but it bore plain evidence that within a few days it had sported a moustache.
"Well," said the officer, "what are you doing here?"
The driver straightened up as if in surprise.
"Blow-out, sir," he said, touching his cap. "I'm carrying these young gentlemen from Waterloo to Ealing, sir. Had to come around on account of the roads."
"You have your way lost, my man. Why not admit it?" said the officer, showing his white teeth in a smile. He turned to Harry and Dick. "Boy Scouts, I see," he commented. "You carry orders concerning the movement of troops from Ealing? They are to entrain—where?"
"Near Croydon, sir, on the Brighton and South Coast line," said Harry, lifting innocent eyes to his questioner.
"So! They go to Dover, then, I suppose—no, perhaps to Folkestone—oh, what matter? Hurry up with your tire, my man!"
He watched them still as the car started. Then he went back to the house.
"Whatever did you tell him that whopper about Croydon for?" whispered Dick. "I wasn't going to tell him anything—"
"Then he might have tried to make us," answered Harry, also in a whisper. "Did you notice anything queer about him?"
"Why, no—"
"'You have your way lost!' Would any Englishman say that, Dick? And wouldn't a German? You've studied German. Translate 'You've lost your way' into German. 'Du hast dein weg—' See? He was a German spy!"
"Oh, Harry! I believe you're right! But why didn't we—"
"Try to arrest him? There may have been a dozen others there, too. And there was the driver. We wouldn't have had a chance. Besides, if he thinks we don't suspect, we may be able to get some valuable information later. I think—"
"What?"
"I'd better not say now. But remember this—we've got to look out for this driver. I think he'll take us straight to Ealing now. When we get to the barracks you stay in the cab—we'll pretend we may have to go back with him."
"I see," said Dick, thrilling with the excitement of this first taste of real war.
Harry was right. The driver's purpose in making such a long detour, whatever it was, had been accomplished. And now he plainly did his best to make up for lost time. He drove fast and well, and in a comparatively short time both the scouts could see that they were on the right track.
"You watch one side. I'll take the other," said Harry. "We've got to be able to find our way back to that house."
This watchfulness confirmed Harry's suspicions concerning the driver, because he made two or three circuits that could have no other purpose than to make it hard to follow his course.
At Ealing he and Dick carried out their plan exactly. Dick stayed with the cab, outside the wall; Harry hurried in. And five minutes after Harry had gone inside a file of soldiers, coming around from another gate, surrounded the cab and arrested the driver.
Harry had reached Colonel Throckmorton without difficulty and before delivering Major French's message, he explained his suspicions regarding the driver.
"What's that? Eh, what's that?" asked the colonel. "Spy? This country's suffering from an epidemic of spy fever—that's what! Still—a taxicab driver, eh? Perhaps he's one of the many who's tried to overcharge me. I'll put him in the guardhouse, anyway! I'll find out if you're right later, young man!"
As a matter of fact, and as Harry surmised, Colonel Throckmorton felt that it was not a time to take chances. He was almost sure that Harry was letting his imagination run away with him, but it would be safer to arrest a man by mistake than to let him go if there was a chance that he was guilty. So he gave the order, and then turned to questionHarry. The scout first gave Major French's message, and Colonel Throckmorton immediately dispatched an orderly after giving him certain whispered instructions.
"Now tell me just why you suspect your driver. Explain exactly what happened," he said. He turned to a stenographer. "Take notes of this, Johnson," he directed.
Harry told his story simply and well. When he quoted the officer's remark to the cab driver, with the German inversion, the colonel chuckled.
"'You have your way lost!' Eh?" he said, with a smile. "You're right—he was no Englishman! Go on!"
When he had finished, the colonel brought down his fist on his desk with a great blow.
"You've done very well, Fleming—that's your name?—very well, indeed," he said, heartily. "We know London is covered with spies but we had flattered ourselves that it didn't matter very much what they found, since there was no way that we could see for them to get their news totheir headquarters in Germany. But now—"
He frowned thoughtfully.
"They might be able to set up a chain of signalling stations," he said. "The thing to do would be to follow them, eh? Do you think you could do that? You might use a motorcycle—know how to ride one?"
"Yes, sir," said Harry.
"Live with your parents, do you? Would they let you go? I don't think it would be very dangerous, and you would excite less suspicion than a man. See if they will let you turn yourself over to me for a few days. Pick out another scout to go with you, if you like. Perhaps two of you would be better than one. Report to me in the morning. I'll write a note to your scoutmaster—Mr. Wharton, isn't it? Right!"
As they made their way homeward, thoroughly worked up by the excitement of their adventure, Harry wondered whether his father would let him undertake this service Colonel Throckmorton had suggested. After all, he was not English, and hefelt that his father might not want him to do it, although Mr. Fleming, he knew, sympathized strongly with the English in the war. He said nothing to Dick, preferring to wait until he was sure that he could go ahead with his plans.
But when he reached his house he found that things had changed considerably in his absence. Both his parents seemed worried; his father seemed especially troubled.
"Harry," he said, "the war has hit us already. I'm called home by cable, and at the same time there is word that your Aunt Mary is seriously ill. Your mother wants to be with her. I find that, by a stroke of luck, I can get quarters for your mother and myself on to-morrow's steamer. But there's no room for you. Do you think you could get along all right if you were left here? I'll arrange for supplies for the house; Mrs. Grimshaw can keep house. And you will have what money you need."
"Of course I can get along!" said Harry, stoutly. "I suppose the steamers are fearfully crowded?"
"Only about half of them are now in service,"said Mr. Fleming. "And the rush of Americans who have been travelling abroad is simply tremendous. Well, if you can manage, it will relieve us greatly. I think we'll be back in less than a month. Keep out of mischief. And write to us as often as you can hear of a steamer that is sailing. If anything happens to you, cable. I'll arrange with Mr. Bruce, at the Embassy, to help you if you need him, but that ought not to be necessary."
Harry was genuinely sorry for his mother's distress at leaving him, but he was also relieved, in a way. He felt now he would not be forbidden to do his part with the scouts. He would be able to undertake what promised to be the greatest adventure that had ever come his way. He had no fear of being left alone for his training as a Boy Scout had made him too self reliant for that.
Mr. and Mrs. Fleming started for Liverpool that night. Train service throughout the country was so disorganized by the military use of the railways that journeys that in normal, peaceful times required only two or three hours were likely to consume a full day. So he went into the city of London with them and saw them off at Euston, which was full of distressed American refugees.
The Flemings found many friends there, of whose very presence in London they were ignorant, and Mr. Fleming, who, thanks to his business connections in London, was plentifully supplied with cash, was able to relieve the distress of some of them.
Many had escaped from France, Germany and Austria with only the clothes they wore, having lost all their luggage. Many more, though possessed of letters of credit or travellers' checks for considerable sums, didn't have enough money to buy a sandwich, since the banks were all closed and no one would cash their checks.
So Harry had another glimpse of the effects of war, seeing how it affected a great many people who not only had nothing to do with the fighting, but were citizens of a neutral nation. He was beginning to understand very thoroughly by this time that war was not what he had always dreamed. It meant more than fighting, more than glory.
But, after all, now that war had come, it was no time to think of such things. He had undertaken, if he could get permission, to do a certain very important piece of work. And now, by a happy accident, as he regarded it, it wasn't necessary for him to ask that permission. He was not forbidden to do any particular thing; his father had simply warned him to be careful.
So when he went home, he whistled outside of Dick Mercer's window, woke him up, and, when Dick came down into the garden, explained to him what Colonel Throckmorton wanted them to do.
"He said I could pick out someone to go with me, Dick," Harry explained. "And, of course, I'd rather have you than anyone I can think of. Will you come along?"
"Will I!" said Dick. "What do you think you'll do, Harry?"
"We may get special orders, of course," said Harry. "But I think the first thing will be to find out just where the signals from that house are being received. They must be answered, you know, sowe ought to find the next station. Then, from that, we can work on to the next."
"Where do you suppose those signals go to?"
"That's what we've got to find out, Dick! But I should think, in the long run, to some place on the East coast. Perhaps they've got some way there of signalling to ships at sea. Anyhow, that's what's got to be discovered. Did you see Graves to-night?"
"No," said Dick, his lips tightening, "I didn't! But I heard about him, all right."
"How? What do you mean?"
"I heard that he'd been doing a lot of talking about you. He said it wasn't fair to have taken you and given you the honor of doing something when there were English boys who were just as capable of doing it as you."
"Oh!" said Harry, with a laugh. "Much I care what he says!"
"Much I care, either!" echoed Dick. "But, Harry, he has made some of the other chaps feel that way, too. They all like you, and they don'tlike him. But they do seem to think some of them should have been chosen."
"Well, it's not my fault," said Harry, cheerfully. "I certainly wasn't going to refuse. And it isn't as if I'd asked Mr. Wharton to pick me out."
"No, and I fancy there aren't many of them who would have done as well as you did to-day, either!"
"Oh, yes, they would! That wasn't anything. We'd better get to bed now. I think we ought to report just as early as we can in the morning. If we get away by seven o'clock, it won't be a bit too early."
"All right. I'll be ready. Good-night, Harry!"
"Good-night, Dick!"
Morning saw them up on time, and off to Ealing. There Colonel Throckmorton gave them their orders.
"I've requisitioned motorcycles for you," he said. "Make sure of the location of the house, so that you can mark it on an ordnance map for me. Then use your own judgment,—but find the next house. I have had letters prepared for you that will introduce you to either the mayor or the military commander in any town you reach and you will get quarters for the night, if you need them. Where do you think your search will lead you, Fleming?"
He eyed Harry sharply as he asked the question.
"Somewhere on the East coast, I think, sir," replied Harry.
"Well, that remains to be seen. Report by telegraph, using this code. It's a simplified version of the official code, but it contains all you will need to use. That is all."
Finding the house, when they started on their motorcycles, did not prove as difficult a task as Harry had feared it might. They both remembered a number of places they had marked from the cab windows, and it was not long before they were sure they were drawing near.
"I remember that hill," said Harry. "By Jove—yes, there it is! On top of that hill, do you see? We won't go much nearer. I don't want them to see us, by any chance. All we need is to notice which way they're signalling."
They watched the house for some time before there was any sign of life. And then it was only the flashes that they saw. Since the previous day some sort of cover had been provided for the man who did the signalling.
"What do you make of it, Dick?" asked Harry eagerly, after the flashing had continued for some moments.
"It looks to me as if they were flashing toward the north and a little toward the west," said Dick, puzzled.
"That's the way it seems to me, too," agreed Harry. "That isn't what we expected, either, is it?"
"Of course we can't be sure."
"No, but it certainly looks that way. Well, we can't make sure from here, but we've got to do it somehow. I tell you what. We'll circle around and get northwest of the house. Then we ought to be able to tell a good deal better. And if we get far enough around, I don't believe they'll see us, or pay any attention to us if they do."
So they mounted their machines again, and in afew moments were speeding toward a new and better spot from which to spy on the house. But this, when they reached it, only confirmed their first guess. The signals were much more plainly visible here, and it was obvious now, as it had not been before, that the screen they had noticed had been erected as much to concentrate the flashes and make them more easily visible to a receiving station as to conceal the operator. So they turned and figured a straight line as well as they could from the spot where the flashes were made. Harry had a map with him, and on this he marked, as well as he could, the location of the house. Then he drew a line from it to the northwest.
"The next station must be on this line somewhere," he said. "We'll stick to it. There's a road, you see, that we can follow that's almost straight. And as soon as we come to a high building we ought to be able to see both flashes—the ones that are being sent from that house and the answering signals. Do you see?"
"Yes, that'll be fine!" said Dick. "Come on!"
"Not so fast!" said a harsh voice behind them. They spun around, and there, grinning a little, but looking highly determined and dangerous, was the same man they had seen the day before, and who had questioned them, when the tire of their taxicab blew out! But now he was not in uniform, but in a plain suit of clothes.
"So you are spying on my house, are you?" he said. "And you lied to me yesterday! No troops were sent to Croydon at all!"
"Well, you hadn't any business to ask us!" said Dick, pluckily. "If you hadn't asked us any questions, we'd have told you no lies."
"I think perhaps you know too much," said the spy, nodding his head. "You had better come with me. We will look after you in this house that interests you so greatly."
He made a movement forward. His hand dropped on Dick's shoulder. But as it did so Harry's feet left the ground. He aimed for the spy's legs, just below the knee, and brought him to the ground with a beautiful diving tackle—the sort he had learnedin his American football days. It was the one attack of all others that the spy did not anticipate, if, indeed, he looked for any resistance at all. He wasn't a football player, so he didn't know how to let his body give and strike the ground limply. The result was that his head struck a piece of hard ground with abnormal violence, and he lay prone and very still.
"Oh, that was ripping, Harry!" cried Dick. "But do you think you've killed him?"
"Killed him? No!" said Harry, with a laugh. "He's tougher than that, Dick!"
But he looked ruefully at the spy.
"I wish I knew what to do with him," he said. "He'll come to in a little while. But—"
"We can get away while he's still out," said Dick, quickly. "He can't follow us and we can get such a start with our motorcycles—"
"Yes, but he'll know their game is up," said Harry. "Don't you see, Dick? He'll tell them they're suspected—and that's all they'll need in the way of warning. When men are doing anything asdesperate as the sort of work they're up to in that house, they take no more chances than they have to. They'd be off at once, and start up somewhere else. We only stumbled on this by mere accident—they might be able to work for weeks if they were warned."
"Oh, I never thought of that! What are we to do, then?"
"I wish I knew whether anyone saw us from the house! If they didn't—! Well, we'll have to risk that. Dick, do you see that house over there? It's all boarded up—it must be empty."
"Yes, I see it." Dick caught Harry's idea at once this time, and began measuring with his eye the distance to the little house of which Harry had spoken. "It's all down hill—I think we could manage it all right."
"We'll try it, anyhow," said Harry. "But first we'd better tie up his hands and feet. He's too strong for the pair of us, I'm afraid, if he should come to."
Once that was done, they began to drag the spytoward the house. Half carrying, half pulling, they got him down the slope, and with a last great effort lifted him through a window, which, despoiled of glass, had been boarded up. They were as gentle as they could be, for the idea of hurting a helpless man, even though he was a spy, went against the grain. But—
"We can't be too particular," said Harry. "And he brought it on himself. I'm afraid he'll have worse than this to face later on."
They dumped him through the window, from which they had taken the boards. Then they made their own way inside, and Harry began to truss up the prisoner more scientifically. He understood the art of tying a man very well indeed, for one of the games of his old scout patrol had involved tying up one scout after another to see if they could free themselves. And when he had done, he stepped back with a smile of satisfaction.
"I don't believe he'll get himself free very soon," he said. "He'll be lucky if that knock on the head keeps him unconscious for a long time, because he'llwake up with a headache, and if he stays as he is, he won't know how uncomfortable he is."
"Are we going to leave him like that, Harry?"
"We've got to, Dick. But he'll be all right. I am going to telephone to Colonel Throckmorton and tell him to send here for him, but to do so at night, and so that no one will notice. He won't starve or die of thirst. I can easily manage to describe this place so that whoever the colonel sends will find it. Come on!"
They went back to their cycles and rode on until they came to a place where they could telephone. Harry explained guardedly, and they went on.
"I hope he'll be all right," said Dick.
"They'll find him, I'm sure," said Harry. "Even if they don't, he'll be all right for a few days—two or three, anyhow. A man can be very uncomfortable and miserable, and still not be in any danger. We don't need half as much food as we eat, really. I've heard that lots of times."
They were riding along the line that Harry had marked on his map, and, a mile or two ahead, there was visible an old-fashioned house, with a tower projecting from its centre. From this, Harry had decided, they should be able to get the view they required and so locate the second heliographing station.
"How far away do you think it ought to be, Harry?" asked Dick.
"It's very hard to tell, Dick. A first-class heliograph is visible for a very long way, if the conditionsare right. That is, if the sun is out and the ground is level. In South Africa, for instance, or in Egypt, it would work for nearly a hundred miles, or maybe even more. But here I should think eight or ten miles would be the limit. And it's cloudy so often that it must be very uncertain."
"Why don't they use flags, then?"
"The way we do in the scouts? Well, I guess that's because the heliograph is so much more secret. You see, with the heliograph the flashes are centered. You've got to be almost on a direct line with them, or not more than fifty yards off the centre line, to see them at all, even a mile away. But anyone can see flags, and read messages, unless they're in code. And if these people are German spies, the code wouldn't help them. Having it discovered that they were sending messages at all would spoil their plans."
"I see. Of course, though—that's just what you said. It was really just by accident that we saw them flashing."
Then they came to the house where they expectedto make their observation. It was occupied by an old gentleman, who came out to see what was wanted and stood behind the servant who opened the door. At the sight of their uniforms he drew himself up very straight, and saluted. But, formal as he was, there was a smile in his eyes.
"Well, boys," he said, "what can I do for you? On His Majesty's service, I suppose?"
"Yes, sir," said Dick. "We'd like to go up in your tower room, if you don't mind."
"Scouting, eh?" said the old gentleman, mystified. "Do you expect to locate the enemy's cavalry from my tower room? Well, well—up with you! You can do no harm."
Dick was inclined to resent the old gentleman's failure to take them seriously, but Harry silenced his protest. As they went up the stairs he whispered: "It's better for him to think that. We don't want anyone to know what we're doing, you know—not yet."
So they reached the tower room, and, just as Harry had anticipated, got a wonderful view of thesurrounding country. They found that the heliograph they had left behind was working feverishly and Harry took out a pencil and jotted down the symbols as they were flashed.
"It's in code, of course," he said, "but maybe we'll find someone who can decipher it—I know they have experts for that. It might come in handy to know what they were talking about."
"There's the other station answering!" said Dick, excitedly, after a moment. "Isn't it lucky that it's such a fine day, Harry? See—there it is, over there!"
"Let me have the glasses," said Harry, taking the binoculars from Dick. "Yes, you're right! They're on the top of a hill, just about where I thought we'd find them, too. Come on! We've got no time to waste. They're a good seven miles from here, and we've a lot more to do yet."
Below stairs the old gentleman tried to stop them. He was very curious by this time, for he had been thinking about them and it had struck him that they were too much in earnest to simply be enjoying alark. But Harry and Dick, while they met his questions politely, refused to enlighten him.
"I'm sorry, sir," said Harry, when the old gentleman pressed him too hard. "But I really think we mustn't tell you why we're here. But if you would like to hear of it later, we'll be glad to come to see you and explain everything."
"Bless my soul!" said the old man. "When I was a boy we didn't think so much of ourselves, I can tell you! But then we didn't have any Boy Scouts, either!"
It was hard to tell from his manner whether that was intended for a compliment or not. But they waited no longer. In a trice they were on their motorcycles and off again. And when they drew near to the hilltop whence the signals had come, Harry stopped. For a moment he looked puzzled, then he smiled.
"I think I've got it!" he said. "They're clever enough to try to fool anyone who got on to their signalling. They would know what everyone would think—that they would be sending their messagesto the East coast, because that is nearest to Germany. That's why they put their first station here. I'll bet they send the flashes zig-zagging all around, but that we'll find they all get east gradually. Now we'll circle around this one until we find out in what direction it is flashing, then we'll know what line we must follow. After that all we've got to do is to follow the line to some high hill or building, and we'll pick up the next station."
Their eyes were more accustomed to the work now, and they wasted very little time. This time, just as Harry had guessed, the flashes were being sent due east, and judging from the first case that the next station would be less than ten miles away, he decided to ride straight on for about that distance. He had a road map, and found that they could follow a straight line, except for one break. They did not go near the hilltop at all.
"I'd like to know what they're doing there," said Dick.
"So would I, but it's open country, and they're probably keeping a close lookout. They're reallysafer doing that in the open than on the roof of a house, out here in the country."
"Because they can hide the heliograph? It's portable, isn't it?"
"Yes. They could stow it away in a minute, if they were alarmed. I fancy we'll find them using hilltops now as much as they can."
"Harry, I've just thought of something. If they've planned so carefully as this, wouldn't they be likely to have country places, where they'd be less likely to be disturbed?"
"Yes, they would. You're right, Dick. Especially as we get further and further away from London. I suppose there must be plenty of places a German could buy or lease."
"And perhaps people wouldn't even know they were Germans, if they spoke good English, and didn't have an accent."
That suggestion of Dick's bore fruit. For the third station they found was evidently hidden away in a private park. It was in the outskirts of a little village, and Harry and Dick had no trouble at allin finding out all the villagers knew of the place.
"'Twas taken a year ago by a rich American gentleman, with a sight of motor cars and foreign-looking servants," they were told. "Very high and mighty he is, too—does all his buying at the stores in Lunnon, and don't give local trade any of his patronage."
The two scouts exchanged glances. Their suspicions were confirmed in a way. But it was necessary to be sure; to be suspicious was not enough for them.
"We'll have to get inside," he said under his breath to Dick. But the villager heard, and laughed.
"Easy enough, if you're friends of his," he said. "If not—look out, master! He's got signs up warning off trespassers, and traps and spring guns all over the place. Wants to be very private, and all that, he does."
"Thanks," said Harry. "Perhaps we'd better not pay him a visit, after all."
The village was a sleepy little place, one of thefew spots Harry had seen to which the war fever had not penetrated. It was not on the line of the railway, and there was not even a telegraph station. By showing Colonel Throckmorton's letter, Harry and Dick could have obtained the right to search the property that they suspected. But that did not seem wise.
"I don't think the village constables here could help us much, Dick," said Harry. "They'd give everything away, and we probably wouldn't accomplish anything except to put them on their guard. I vote we wait until dark and try to find out what we can by ourselves. It's risky but even if they catch us, I don't think we need to be afraid of their doing anything."
"I'm with you," said Dick. "We'll do whatever you say."
They spent the rest of the afternoon scouting around the neighboring country on their motorcycles, studying the estate from the roads that surrounded it. Bray Park, it was called, and it had for centuries belonged to an old family, which, however, had been glad of the high rent it had been able to extract from the rich American who had taken the place.
What they saw was that the grounds seemed to be surrounded, near the wall, by heavy trees, which made it difficult to see much of what was within. But in one place there was a break, so that, looking across velvety green lawns, they could see a small part of an old and weatherbeaten grey house. It appeared to be on a rise, and to stand several stories above the ground, so that it might well be an ideal place for the establishment of a heliograph station. But Harry's suspicions were beginning to take a new turn.
"I believe this is the biggest find we've made yet, Dick," he said. "I think we'll find that if we discover what is really going on here, we'll be at the end of our task—or very near it. It's just the place for a headquarters."
"I believe it is, Harry. And if they've been so particular to keep everything about it secret, it certainly seems that there must be something important to hide," suggested Harry, thinking deeply.
"I think I'll write a letter to Colonel Throckmorton, Dick. I'll tell him about this place, and that we're trying to get in and find out what we can about it. Then, if anything happens to us, he'll know what we were doing, and he will have heard about this place, even if they catch us. I'll post it before we go in."
"That's a splendid idea, Harry. I don't see how you think of everything the way you do."
"I think it's because my father's always talking about how one ought to think of all the things that can go wrong. He says that the way he's got along in business is by never being surprised by having something unfortunate happen, and by always trying to be ready to make it as trifling as it can be."
So Harry wrote and posted his letter, taking care to word it so that it would be hard for anyone except Colonel Throckmorton to understand it. And, even after having purposely made the wording rather obscure, he put it into code. And, after that, he thoughtof still another precaution that might be wise.
"We won't need the credentials we've got in there to-night, Dick," he said. "Nor our copies of the code, either. We'll bury them near where we leave our motorcycles. Then when we get out we can easily get them back, and if we should be caught they won't be found on us. Remember, if we are caught, we're just boys out trespassing. Let them think we're poachers, if they like."
But even Harry could think of no more precautions after that, and they had a long and tiresome wait until they thought it was dark enough to venture within the walls.
Getting over the wall was not difficult. They had thought they might find broken glass on top, but there was nothing of the sort. Once inside, however, they speedily discovered why that precaution was not taken—and also that they had had a remarkably narrow escape. For scarcely had they dropped to the ground and taken shelter when they saw a figure, carrying a gun, approaching. It was a man making the rounds of the wall. While theywatched he met another man, also armed, and turned to retrace his steps.
"They've got two men, at least—maybe a lot more, doing that," whispered Harry. "We've got to find out just how often he passes that spot. We want to know if the intervals are regular, too, so that we can calculate just when he'll be there."
Three times the man came and went, while they waited, timing him. And Harry found that he passed the spot at which they had entered every fifteen minutes. That was not exact for there was a variation of a minute or so, but it seemed pretty certain that he would pass between thirteen and seventeen minutes after the hour, and so on.
"So we'll know when it's safe to make a dash to get out," said Harry. "The first thing a general does, you know, is to secure his retreat. He doesn't expect to be beaten, but he wants to know that he can live to fight another day if he is."
"We've got to retreat, haven't we?" said Dick. "It wouldn't do us any good to stay here."
"That's so. But we've got to advance first. Nowto get near that house, and see what we can find. Look out for those traps and things our friend warned us of. It looks like just the place for them. And keep to cover!"
They wormed their way forward, often crawling along. Both knew a good deal about traps and how they are set, and their common sense enabled them to see the most likely places for them. They kept to open ground, avoiding shrubbery and what looked like windfalls of branches. Before they came into full view of the house they had about a quarter of a mile to go. And it was an exciting journey.
They dared not speak to one another. For all about, though at first they could see nothing, there was the sense of impending danger. They felt that unseen eyes were watching, not for them, perhaps, but for anyone who might venture to intrude and pass the first line. Both of the scouts felt that they were tilting against a mighty force; that the organization that would perfect, in time of peace, such a system of espionage in the heart of the country of a possible enemy, was of the most formidable sort.
They stopped, at last, at the edge of the clump of thick, old trees that seemed to surround the place. Here they faced the open lawn, and Harry realized that to try to cross it was too risky. They would gain nothing by being detected. They could find out as much here by keeping their eyes and ears open, he thought, as by going forward, when they were almost sure to be detected.
"We'll stay here," he whispered to Dick, cautiously. "Dick, look over there—to the left of the house. You see where there's a shadow by that central tower? Well, to the left of that. Do you see some wires dangling there? I'm not sure."
"I think there are," whispered Dick, after a moment in which he peered through the darkness. Dick had one unusual gift. He had almost a savage's ability to see in the dark, although in daylight his sight was by no means out of the ordinary.
"Look!" he said, again, suddenly. "Up on top of the tower! There is something going up there—it's outlined against that white cloud!"
Harry followed with his eyes. And Dick wasright. A long, thin pole was rising, even as they looked. Figures showed on the roof of the tower. They were busy about the pole. It seemed to grow longer as they watched. Then, suddenly, the dangling wires they had first noticed were drawn taut, and they saw a cross-piece on the long pole. And then, with a sudden rush of memory, Harry understood.
"Oh! We have struck it!" he said. "I remember now—a portable, collapsible wireless installation! I've wondered how they could use wireless, knowing that someone would be sure to pick up the signals and that the plant would be run down. But they have those poles made in sections—they could hide the whole thing. It takes very little time to set them up. This is simply a bigger copy of what they use in the field. We've got to get out!"
He looked at his watch.
"Carefully, now," he said. "We've just about got time. That sentry must be just about passing the place where we got over the wall now. By the time we get there he'll be gone, and we can slip out.We've got everything we came for, now that we've seen that!"
They started on the return journey through the woods. More than ever there seemed to be danger about them. And suddenly it reached out and gripped them—gripped Harry, at least. As he took a step his foot sank through the ground, as it seemed. The next moment he had all he could do to suppress a cry of agony as a trap closed about his ankle, wrenching it, and throwing him down.
"Go on!" he said to Dick, suppressing his pain by a great effort.
"I won't leave you!" said Dick. "I—"
"Obey orders! Don't you see you've got to go? You've got to tell them about the wireless—and about where I am! Or else how am I to get away? Perhaps if you come back quickly with help they won't find me until you come! Hurry—hurry!"
Dick understood. And, with a groan, he obeyed orders, and went.
Probably Dick did not realize that he was really showing a high order of courage in going while Harry remained behind, caught in that cruel trap and practically in the hands of enemies who were most unlikely to treat him well. In fact, as he made his way toward the wall, Dick was reproaching himself bitterly.
"I ought to stay!" he kept on saying to himself over and over again. "I ought not to leave him so! He made me go so that I would be safe!"
There had been no time to argue, or Harry might have been able to make him understand that it was at least as dangerous to go as to stay—perhaps even more dangerous. Dick did not think that there was at least a chance that every trap was wired, so that springing it would sound an alarm in some central spot. If that were so, as Harry had fully understood, escape for Dick would be most difficult and probably he too would be captured.
"I'm such a coward!" Dick almost sobbed to himself, for he was frightened, though, it must be said, less on his account than at the thought of Harry.
Yet he did not stop. He went on resolutely, and, as he got used to the idea that he must depend on himself, without Harry to help him in any emergency that arose, his courage returned. He stopped, just as he knew Harry would have done, several feet short of the wall. His watch told him that he had time enough to make a dash; had several minutes to spare, in fact. But he made sure.
And it was well that he did. For some alarm had been given. He heard footsteps of running men, and in a moment two men, neither of them the one they knew as the sentry, came running along the wall. They carried pocket flashlights, and were examining the ground carefully. Dick sensed at once what they meant to do, and shrank into the shelter of a great rhododendron bush. He was small for his age, and exceptionally lissome, and he felt that the leaves would conceal him for a fewmoments at least. He was taking a risk of finding a trap in the bush, but it was the lesser of the two evils just then. And luck favored him. He encountered no trap.
Then one of the men with flashlights gave a cry that sounded to Dick just like the note of a dog that has picked up a lost scent. The lights were playing on the ground just where they had crossed the wall.
"Footsteps, Hans!" said the man. "Turned from the wall, too! They have gone in, but have not come out."
"How many?" asked the other man, coming up quickly.
"Two, I think—no more," said the discoverer. "Now we shall follow them."
Dick held his breath. If they could follow the footsteps—and there was no reason in the world to hope that they could not!—they would be bound to pass within a foot or two of his hiding-place. And, as he realized, they would, when they were past him, find the marks of his feetreturning. Theywould know then that he was between them and the wall. He realized what that would mean. Bravely he nerved himself to take the one desperate chance that remained to him. They were far too strong for him to have a chance to meet them on even terms; all he could hope for was an opportunity to make use of his light weight and his superior speed. He knew that he could move two feet, at least, to their one. And so he waited, crouching, until they went by. The light flashed by the bush; for some reason, it did not strike it directly. That gave him a respite. Fortunately they were looking for footprints, not for their makers.
The moment they were by, Dick took the chance of making a noise, and pushed through the bush, to reach the other side. And, just as the cry of the man who first had seen the footprints sounded again, he got through. At once, throwing off all attempt at silence, he started running, crouched low. He was only a dozen feet from the wall. He leaped for a projection a few feet up. By a combination of good luck and skill he reached it with his hands.A moment later he had swarmed over the wall and dropped to the other side just as a shot rang out behind. The bullet struck the wall; chipped fragments of stone flew all over him. But he was not hurt, and he ran as he had never known he could run, keeping to the side of the road, where he was in a heavy shadow.
As soon as he could, he burst through a hedge on the side of the road opposite the wall, and ran on, sheltered by the hedge, until, to his delight, he plunged headfirst into a stream of water. The fall knocked him out for a moment, but the cold water revived him, and he did not mind the scraped knee and the barked knuckles he owed to the sharp stones in the bed of the little brook. He changed his course at once, following the brook, since in that no telltale footprints would be left.
Behind him he heard the sound of pursuit for a little while, but he judged that the brook would save him. He could not be pursued very far. Even in this sleepy countryside he would find it easy to get help, and the Germans, as he was now sure theywere, would have to give up the chase. All that had been essential had been for him to get a few hundred feet from the park; after that he was safe.
But, if he was safe, he was hopelessly lost. At least he would have been, had he been an ordinary boy, without the scout training. He was in unknown country and he had been chased away from all the landmarks he had. It was of the utmost importance that he should reach as soon as possible, and, especially, without passing too near Bray Park, the spot where the motorcycles and the papers and codes had been cached. And, when he finally came to a full stop, satisfied that he no longer had anything to fear from pursuit, he was completely in the dark as to where he was.
However, his training asserted itself. Although Harry had been in charge, Dick had not failed to notice everything about the place where they made their cache that would help to identify it. That was instinct with him by this time, after two years as a scout; it was second nature. And, though it had been light, he had pictured pretty accurately whatthe place would look like at night. He remembered, for instance, that certain stars would be sure to be in the sky in a particular relation to the cache. And now he looked up and worked out his own position. To do that he had to reconstruct, with the utmost care, his movements since he had left the cache. Up to the moment when he and Harry had entered Bray Park that was easy.
But the chase had confused him, naturally. He had doubled on his track more than once, trying to throw his pursuers off. But by remembering accurately the position of Bray Park in its relation to the cache, and by concentrating as earnestly as he could, to remember as much as possible of the course of his flight, he arrived presently at a decision of how he must proceed to retrieve the motorcycles and the papers.
As soon as he had done so he hurried on, feverishly, taking a course that, while longer than necessary, was essential since he dared not go near Bray Park. He realized thoroughly how much depended on his promptness. It was essential that ColonelThrockmorton should learn of the wireless station, which was undoubtedly powerful enough to send its waves far out to sea, even if not to the German coast itself.
And there was Harry. The only chance of rescue for him lay in what Dick might do. That thought urged him on even more than the necessity of imparting what they had learned.
So, scouting as he went, lest he encounter some prowling party from Bray Park silently looking for him, he went on hastily. He was almost as anxious to avoid the village as the spy headquarters, for he knew that in such places strangers might be regarded with suspicion even in times of peace. And, while the war fever had not seemed to be in evidence in the afternoon, he knew that it might have broken out virulently in the interval. He had heard the stories of spy baiting in other parts of the country; how, in some localities, scores of absolutely innocent tourists had been arrested and searched. So he felt he must avoid his friends as well as his enemies until he had means of proving his identity.
Delaying as he was by his roundabout course, it took him nearly an hour to come to scenes that were familiar. But then he knew that he had found himself, with the aid of the stars. Familiar places that he had marked when they made the cache appeared, and soon he reached it. But it was empty; motorcycles and papers—all were gone!