CHAPTER V.

TTwenty minutes' walk took Arnold and Colston to the door of the tenement-house in which the former had lived since his fast-dwindling store of money had convinced him of the necessity of bringing his expenses down to the lowest possible limit if he wished to keep up the struggle with fate very much longer.

Twenty minutes' walk took Arnold and Colston to the door of the tenement-house in which the former had lived since his fast-dwindling store of money had convinced him of the necessity of bringing his expenses down to the lowest possible limit if he wished to keep up the struggle with fate very much longer.

As they mounted the dirty, evil-smelling staircase, Colston said—

"Phew! Verily you are a hero of science if you have brought yourself to live in a hole like this for a couple of years rather than give up your dream, and grow fat on the loaves and fishes of conventionality."

"This is a palace compared with some of the rookeries about here," replied Arnold, with a laugh. "The march of progress seems to have left this half of London behind as hopeless. Ten years ago there were a good many thousands of highly respectable mediocrities living on this side of the river, but now I am told that the glory has departed from the very best of its localities, and given them up to various degrees of squalor. Vice, poverty, and misery seem to gravitate naturally southward in London. I don't know why, but they do. Well, here is the door of my humble den."

As he spoke he put the key in the lock, and opened the door, bidding his companion enter as he did so.

Arnold's anxiety was soon relieved by finding the precious model untouched in its resting-place, and it was at once brought out. Colston was delighted beyond his powers ofexpression with the marvellous ingenuity with which the miracle of mechanical skill was contrived and put together; and when Arnold, after showing and explaining to him all the various parts of the mechanism and the external structure, at length set the engine working, and the air-ship rose gracefully from the floor and began to sail round the room in the wide circle to which it was confined by its mooring-line, he stared at it for several minutes in wondering silence, following it round and round with his eyes, and then he said in a voice from which he vainly strove to banish the signs of the emotion that possessed him—

"It is the last miracle of science! With a few such ships as that one could conquer the world in a month!"

"Yes, that would not be a very difficult task, seeing that neither an army nor a fleet could exist for twelve hours with two or three of them hovering above it," replied Arnold.

The trial over, Arnold set to work and took the model partly to pieces for packing up; and while he was putting it away in the old sea-chest, Colston counted out ten sovereigns and laid them on the table. Hearing the clink of the gold, Arnold looked up and said—

"What is that for? A sovereign will be quite enough to get me out of my present scrape, and then if we come to any terms to-night it will be time enough to talk about payment."

"The Brotherhood does not do business in that way," was the reply. "At present your only connection with it is a commercial one, and ten pounds is a very moderate fee for the privilege of inspecting such an invention as this. Anyhow, that is what I am ordered to hand over to you in payment for your trouble now and to-night, so you must accept it as it is given—as a matter of business."

"Very well," said Arnold, closing and locking the chest as he spoke, "if you think it worth ten pounds, the money will not come amiss to me. Now, if you will remain and guard the household gods for a minute, I will go and pay my rent and get a cab."

Half an hour later his few but priceless possessions were loaded on a four-wheeler and Arnold had bidden farewell for ever to the dingy room in which he had passed so many hours of toil and dreaming, suffering and disappointment. Beforelunch time they were safely bestowed in a couple of rooms which Colston had engaged for him in the same building in which his own rooms were.

In the afternoon, among other purchases, a more convenient case was bought for the model, and in this it was packed with the plans and papers which explained its construction, ready for the evening journey.

The two friends dined together at six in Colston's rooms, and at seven sharp his servant announced that the cab was at the door. Within ten minutes they were bowling along the Embankment towards Westminster Bridge in a luxuriously appointed hansom of the newest type, with the precious case lying across their knees.

"This is a comfortable cab," said Arnold, when they had gone a hundred yards or so. "By the way, how does the man know where to go? I didn't hear you give him any directions."

"None were necessary," was the reply. "This cab, like a good many others in London, belongs to the Brotherhood, and the man who is driving is one of the Outer Circle. Our Jehus are the most useful spies that we have. Many is the secret of the enemy that we have learnt from, and many is the secret police agent who has been driven to his rendezvous by a Terrorist who has heard every word that has been spoken on the journey."

"How on earth is that managed?"

"Every one of the cabs is fitted with a telephonic arrangement communicating with the roof. The driver has only to button the wire of the transmitter up inside his coat so that the transmitter itself lies near to his ear, and he can hear even a whisper inside the cab.

"The man who is driving us, for instance, has a sort of retainer from the Russian Embassy to be on hand at certain hours on certain nights in the week. Our cabs are all better horsed, better appointed, and better driven than any others in London, and, consequently, they are favourites, especially among the young attachés, and are nearly always employed by them on their secret missions or love affairs, which, by the way, are very often the same thing. Our own Jehu has a job on to-night, from which we expect some results that will mystify the enemy not a little. We got our first suspicions ofAinsworth from a few incautious words that he spoke in one of our cabs."

"It's a splendid system, I should think, for discovering the movements of your enemies," said Arnold, not without an uncomfortable reflection on the fact that he was himself now completely in the power of this terrible organisation, which had keen eyes and ready hands in every capital of the civilised world. "But how do you guard against treachery? It is well known that all the Governments of Europe are spending money like water to unearth this mystery of the Terror. Surely all your men cannot be incorruptible."

"Practically they are so. The very mystery which enshrouds all our actions makes them so. We have had a few traitors, of course; but as none of them has ever survived his treachery by twenty-four hours, a bribe has lost its attraction for the rest."

In such conversation as this the time was passed, while the cab crossed the river and made its way rapidly and easily along Kennington Road and Clapham Road to Clapham Common. At length it turned into the drive of one of those solid abodes of pretentious respectability which front the Common, and pulled up before a big stucco portico.

"Here we are!" exclaimed Colston, as the doors of the cab automatically opened. He got out first, and Arnold handed the case to him, and then followed him.

Without a word the driver turned his horse into the road again and drove off towards town, and as they ascended the steps the front door opened, and they went in, Colston saying as they did so—

"Is Mr. Smith at home?"

"Yes, sir; you are expected, I believe. Will you step into the drawing-room?" replied the clean-shaven and immaculately respectable man-servant, in evening dress, who had opened the door for them.

They were shown into a handsomely furnished room lit with electric light. As soon as the footman had closed the door behind him, Colston said—

"Well, now, here you are in the conspirators' den, in the very headquarters of those Terrorists for whom Europe is being ransacked constantly without the slightest success. I haveoften wondered what the rigid respectability of Clapham Common would think if it knew the true character of this harmless-looking house. I hardly think an earthquake in Clapham Road would produce much more sensation than such a discovery would.

"And now," he continued, his tone becoming suddenly much more serious, "in a few minutes you will be in the presence of the Inner Circle of the Terrorists, that is to say, of those who practically hold the fate of Europe in their hands. You know pretty clearly what they want with you. If you have thought better of the business that we have discussed you are still at perfect liberty to retire from it, on giving your word of honour not to disclose anything that I have said to you."

"I have not the slightest intention of doing anything of the sort," replied Arnold. "You know the conditions on which I came here. I shall put them before your Council, and if they are accepted your Brotherhood will, within their limits, have no more faithful adherent than I. If not, the business will simply come to an end as far as I am concerned, and your secret will be as safe with me as though I had taken the oath of membership."

"Well said!" replied Colston, "and just what I expected you to say. Now listen to me for a minute. Whatever you may see or hear for the next few minutes say nothing till you are asked to speak. I will say all that is necessary at first. Ask no questions, but trust to anything that may seem strange being explained in due course—as it will be. A single indiscretion on your part might raise suspicions which would be as dangerous as they would be unfounded. When you are asked to speak do so without the slightest fear, and speak your mind as openly as you have done to me."

"You need have no fear for me," replied Arnold. "I think I am sensible enough to be prudent, and I am quite sure that I am desperate enough to be fearless. Little worse can happen to me than the fate that I was contemplating last night."

As he ceased speaking there was a knock at the door. It opened and the footman reappeared, saying in the most commonplace fashion—

"Mr. Smith will be happy to see you now, gentlemen. Will you kindly walk this way?"

They followed him out into the hall, and then, somewhat to Arnold's surprise, down the stairs at the back, which apparently led to the basement of the house.

The footman preceded them to the basement floor and halted before a door in a little passage that looked like the entrance to a coal cellar. On this he knocked in peculiar fashion with the knuckles of one hand, while with the other he pressed the button of an electric bell concealed under the paper on the wall. The bell sounded faintly as though some distance off, and as it rang the footman said abruptly to Colston—

"Das Wort ist Freiheit."

Arnold knew German enough to know that this meant "The word is 'Freedom,'" but why it should have been spoken in a foreign language mystified him not a little.

While he was thinking about this the door opened, as if by a released spring, and he saw before him a long, narrow passage, lit by four electric arcs, and closed at the other end by a door, guarded by a sentry armed with a magazine rifle.

He followed Colston down the passage, and when within a dozen feet of the sentry, he brought his rifle to the "ready," and the following strange dialogue ensued between him and Colston—

"Quien va?"

"Zwei Freunde der Bruderschaft."

"Por la libertad?"

"Für Freiheit über alles!"

"Pass, friends."

The rifle grounded as the words were spoken, and the sentry stepped back to the wall of the passage.

At the same moment another bell rang beyond the door, and then the door itself opened as the other had done.

They passed through, and it closed instantly behind them, leaving them in total darkness.

Colston caught Arnold by the arm, and drew him towards him, saying as he did so—

"What do you think of our system of passwords?"

"Pretty hard to get through unless one knew them, I should think. Why the different languages?"

"To make assurance doubly sure every member of the Inner Circle must be conversant with four European languages. Onthese the changes are rung, and even I did not know what the two languages were to be to-night before I entered the house, and if I had asked for 'Mr. Brown' instead of 'Mr. Smith,' we should never have got beyond the drawing-room.

"When the footman told me in German that the word was 'Freedom,' I knew that I should have to answer the challenge of the sentry in German. I did not know that he would challenge in Spanish, and if I had not understood him, or had replied in any other language but German, he would have shot us both down without saying another word, and no one would ever have known what had become of us. You will be exempt from this condition, because you will always come with me. I am, in fact, responsible for you."

"H'm, there doesn't seem much chance of any one getting through on false pretences," replied Arnold, with an irrepressible shudder. "Has any one ever tried?"

"Yes, once. The two gentlemen whose disappearance made the famous 'Clapham Mystery' of about twelve months ago. They were two of the smartest detectives in the French service, and the only two men who ever guessed the true nature of this house. They are buried under the floor on which you are standing at this moment."

The words were spoken with a cruel inflexible coldness, which struck Arnold like a blast of frozen air. He shivered, and was about to reply when Colston caught him by the arm again, and said hurriedly—

"H'st! We are going in. Remember what I said, and don't speak again till some one asks you to do so."

As he spoke a door opened in the wall of the dark chamber in which they had been standing for the last few minutes, and a flood of soft light flowed in upon their dazzled eyes. At the same moment a man's voice said from the room beyond in Russian—

"Who stands there?"

"Maurice Colston and the Master of the Air," replied Colston in the same language.

"You are welcome," was the reply, and then Colston, taking Arnold by the arm, led him into the room.

THE INNER CIRCLE.

As soon as Arnold's eyes got accustomed to the light, he saw that he was in a large, lofty room with panelled walls adorned with a number of fine paintings. As he looked at these his gaze was fascinated by them, even more than by the strange company which was assembled round the long table that occupied the middle of the room.

As soon as Arnold's eyes got accustomed to the light, he saw that he was in a large, lofty room with panelled walls adorned with a number of fine paintings. As he looked at these his gaze was fascinated by them, even more than by the strange company which was assembled round the long table that occupied the middle of the room.

Though they were all manifestly the products of the highest form of art, their subjects were dreary and repulsive beyond description. There was a horrible realism about them which reminded him irresistibly of the awful collection of pictorial horrors in the Musée Wiertz, in Brussels—those works of the brilliant but unhappy genius who was driven into insanity by the sheer exuberance of his own morbid imagination.

Here was a long line of men and women in chains staggering across a wilderness of snow that melted away into the horizon without a break. Beside them rode Cossacks armed with long whips that they used on men and women alike when their fainting limbs gave way beneath them, and they were like to fall by the wayside to seek the welcome rest that only death could give them.

There was a picture of a woman naked to the waist, and tied up to a triangle in a prison yard, being flogged by a soldier with willow wands, while a group of officers stood by, apparently greatly interested in the performance. Another painting showed a poor wretch being knouted to death in the market-place of a Russian town, and yet another showed a young and beautiful woman in a prison cell with her face distorted by the horribleleer of madness, and her little white hands clawing nervously at her long dishevelled hair.

Arnold stood for several minutes fascinated by the hideous realism of the pictures, and burning with rage and shame at the thought that they were all too terribly true to life, when he was startled out of his reverie by the same voice that had called them from the dark room saying to him in English—

"Well, Richard Arnold, what do you think of our little picture gallery? The paintings are good in themselves, but it may make them more interesting to you if you know that they are all faithful reproductions of scenes that have really taken place within the limits of the so-called civilised and Christian world. There are some here in this room now who have suffered the torments depicted on those canvases, and who could tell of worse horrors than even they portray. We should like to know what you think of our paintings?"

Arnold glanced towards the table in search of Colston, but he had vanished. Around the long table sat fourteen masked and shrouded forms that were absolutely indistinguishable one from the other. He could not even tell whether they were men or women, so closely were their forms and faces concealed. Seeing that he was left to his own discretion, he laid the case containing the model, which he had so far kept under his arm, down on the floor, and, facing the strange assembly, said as steadily as he could—

"My own reading tells me that they are only too true to the dreadful reality. I think that the civilised and Christian Society which permits such crimes to be committed against humanity, when it has the power to stop them by force of arms, is neither truly civilised nor truly Christian."

"And wouldyoustop them if you could?"

"Yes, if it cost the lives of millions to do it! They would be better spent than the thirty million lives that were lost last century over a few bits of territory."

"That is true, and augurs well for our future agreement. Be kind enough to come to the table and take a seat."

The masked man who spoke was sitting in the chair at the foot of the table, and as he said this one of those sitting at the side got up and motioned to Arnold to take his place. As soon as he had done so the speaker continued—

"We are glad to see that your sentiments are so far in accord with our own, for that fact will make our negotiations all the easier.

"As you are aware, you are now in the Inner Circle of the Terrorists. Yonder empty chair at the head of the table is that of our Chief, who, though not with us in person, is ever present as a guiding influence in our councils. We act as he directs, and it was from him that we received news of you and your marvellous invention. It is also by his direction that you have been invited here to-night with an object that you are already aware of.

"I see from your face that you are about to ask how this can be, seeing that you have never confided your secret to any one until last night. It will be useless to ask me, for I myself do not know. We who sit here simply execute the Master's will. We ask no questions, and therefore we can answer none concerning him."

"I have none to ask," said Arnold, seeing that the speaker paused as though expecting him to say something. "I came at the invitation of one of your Brotherhood to lay certain terms before you, for you to accept or reject as seems good to you. How you got to know of me and my invention is, after all, a matter of indifference to me. With your perfect system of espionage you might well find out more secret things than that."

"Quite so," was the reply. "And the question that we have to settle with you is how far you will consent to assist the work of the Brotherhood with this invention of yours, and on what conditions you will do so."

"I must first know as exactly as possible what the work of the Brotherhood is."

"Under the circumstances there is no objection to your knowing that. In the first place, that which is known to the outside world as the Terror is an international secret society underlying and directing the operations of the various bodies known as Nihilists, Anarchists, Socialists—in fact, all those organisations which have for their object the reform or destruction, by peaceful or violent means, of Society as it is at present constituted.

"Its influence reaches beyond these into the various tradeunions and political clubs, the moving spirits of which are all members of our Outer Circle. On the other side of Society we have agents and adherents in all the Courts of Europe, all the diplomatic bodies, and all the parliamentary assemblies throughout the world.

"We believe that Society as at present constituted is hopeless for any good thing. All kinds of nameless brutalities are practised without reproof in the names of law and order, and commercial economics. On one side human life is a splendid fabric of cloth of gold embroidered with priceless gems, and on the other it is a mass of filthy, festering rags, swarming with vermin.

"We think that such a Society—a Society which permits considerably more than the half of humanity to be sunk in poverty and misery while a very small portion of it fools away its life in perfectly ridiculous luxury—does not deserve to exist, and ought to be destroyed.

"We also know that sooner or later it will destroy itself, as every similar Society has done before it. For nearly forty years there has now been almost perfect peace in Europe. At the same time, over twenty millions of men are standing ready to take the field in a week.

"War—universal war that will shake the world to its foundations—is only a matter of a little more delay and a few diplomatic hitches. Russia and England are within rifleshot of each other in Afghanistan, and France and Germany are flinging defiances at each other across the Rhine.

"Some one must soon fire the shot that will set the world in a blaze, and meanwhile the toilers of the earth are weary of these dreadful military and naval burdens, and would care very little if the inevitable happened to-morrow.

"It is in the power of the Terrorists to delay or precipitate that war to a certain extent. Hitherto all our efforts have been devoted to the preservation of peace, and many of the so-called outrages which have taken place in different parts of Europe, and especially in Russia, during the last few years, have been accomplished simply for the purpose of forcing the attention of the administrations to internal affairs for the time, and so putting off what would have led to a declaration of war.

"This policy has not been dictated by any hope of avoiding war altogether, for that would have been sheer insanity. We have simply delayed war as long as possible, because we have not felt that we have been strong enough to turn the tide of battle at the right moment in favour of the oppressed ones of the earth and against their oppressors.

"But this invention of yours puts a completely different aspect on the European situation. Armed with such a tremendous engine of destruction as a navigable air-ship must necessarily be, when used in conjunction with the explosives already at our disposal, we could make war impossible to our enemies by bringing into the field a force with which no army or fleet could contend without the certainty of destruction. By these means we should ultimately compel peace and enforce a general disarmament on land and sea.

"The vast majority of those who make the wealth of the world are sick of seeing that wealth wasted in the destruction of human life, and the ruin of peaceful industries. As soon, therefore, as we are in a position to dictate terms under such tremendous penalties, all the innumerable organisations with which we are in touch all over the world will rise in arms and enforce them at all costs.

"Of course, it goes without saying that the powers that are now enthroned in the high places of the world will fight bitterly and desperately to retain the rule that they have held for so long, but in the end we shall be victorious, and then on the ruins of this civilisation a new and a better shall arise.

"That is a rough, brief outline of the policy of the Brotherhood, which we are going to ask you to-night to join. Of course, in the eyes of the world we are only a set of fiends, whose sole object is the destruction of Society, and the inauguration of a state of universal anarchy. That, however, has no concern for us. What is called popular opinion is merely manufactured by the Press according to order, and does not count in serious concerns. What I have described to you are the true objects of the Brotherhood; and now it remains for you to say, yes or no, whether you will devote yourself and your invention to carrying them out or not."

For two or three minutes after the masked spokesman of the Inner Circle had ceased speaking, there was absolutesilence in the room. The calmly spoken words which deliberately sketched out the ruin of a civilisation and the establishment of a new order of things made a deep impression on Arnold's mind. He saw clearly that he was standing at the parting of the ways, and facing the most tremendous crisis that could occur in the life of a human being.

It was only natural that he should look back, as he did, to the life from which a single step would now part him for ever, without the possibility of going back. He knew that if he once put his hands to the plough, and looked back, death, swift and inevitable, would be the penalty of his wavering. This, however, he had already weighed and decided.

Most of what he had heard had found an echo in his own convictions. Moreover, the life that he had left had no charms for him, while to be one of the chief factors in a world-revolution was a destiny worthy both of himself and his invention. So the fatal resolution was taken, and he spoke the words that bound him for ever to the Brotherhood.

"As I have already told Mr. Colston," he began by saying, "I will join and faithfully serve the Brotherhood if the conditions that I feel compelled to make are granted"—

"We know them already," interrupted the spokesman, "and they are freely granted. Indeed, you can hardly fail to see that we are trusting you to a far greater extent than it is possible for us to make you trust us, unless you choose to do so. The air-ship once built and afloat under your command, the game of war would to a great extent be in your own hands. True, you would not survive treachery very long; but, on the other hand, if it became necessary to kill you, the air-ship would be useless, that is, if you took your secret of the motive power with you into the next world."

"As I undoubtedly should," added Arnold quietly.

"We have no doubt that you would," was the equally quiet rejoinder. "And now I will read to you the oath of membership that you will be required to sign. Even when you have heard it, if you feel any hesitation in subscribing to it, there will still be time to withdraw, for we tolerate no unwilling or half-hearted recruits."

Arnold bowed his acquiescence, and the spokesman took a piece of paper from the table and read aloud—

"I, Richard Arnold, sign this paper in the full knowledge that in doing so I devote myself absolutely for the rest of my life to the service of the Brotherhood of Freedom, known to the world as the Terrorists. As long as I live its ends shall be my ends, and no human considerations shall weigh with me where those ends are concerned. I will take life without mercy, and yield my own without hesitation at its bidding. I will break all other laws to obey those which it obeys, and if I disobey these I shall expect death as the just penalty of my perjury."

As he finished reading the oath, he handed the paper to Arnold, saying as he did so—

"There are no theatrical formalities to be gone through. Simply sign the paper and give it back to me, or else tear it up and go in peace."

Arnold read it through slowly, and then glanced round the table. He saw the eyes of the silent figures sitting about him shining at him through the holes in their masks. He laid the paper down on the table in front of him, dipped a pen in an inkstand that stood near, and signed the oath in a firm, unfaltering hand. Then—committed for ever, for good or evil, to the new life that he had adopted—he gave the paper back again.

The President took it and read it, and then passed it to the mask on his right hand. It went from one to the other round the table, each one reading it before passing it on, until it got back to the President. When it reached him he rose from his seat, and, going to the fireplace, dropped it into the flames, and watched it until it was consumed to ashes. Then, crossing the room to where Arnold was sitting, he removed his mask with one hand, and held the other out to him in greeting, saying as he did so—

"Welcome to the Brotherhood! Thrice welcome! for your coming has brought the day of redemption nearer!"

NEW FRIENDS.

As Arnold returned the greeting of the President, all the other members of the Circle rose from their seats and took off their masks and the black shapeless cloaks which had so far completely covered them from head to foot.

As Arnold returned the greeting of the President, all the other members of the Circle rose from their seats and took off their masks and the black shapeless cloaks which had so far completely covered them from head to foot.

Then, one after the other, they came forward and were formally introduced to him by the President. Nine of the fourteen were men, and five were women of ages varying from middle age almost to girlhood. The men were apparently all between twenty-five and thirty-five, and included some half-dozen nationalities among them.

All, both men and women, evidently belonged to the educated, or rather to the cultured class. Their speech, which seemed to change with perfect ease from one language to another in the course of their somewhat polyglot converse, was the easy flowing speech of men and women accustomed to the best society, not only in the social but the intellectual sense of the word.

All were keen, alert, and swift of thought, and on the face of each one there was the dignifying expression of a deep and settled purpose which at once differentiated them in Arnold's eyes from the ordinary idle or merely money-making citizens of the world.

As each one came and shook hands with the new member of the Brotherhood, he or she had some pleasant word of welcome and greeting for him; and so well were the words chosen, and so manifestly sincerely were they spoken, that by the time he had shaken hands all round Arnold felt as much at home among them as though he were in the midst of a circle of old friends.

Among the women there were two who had attracted his attention and roused his interest far more than any of the other members of the Circle. One of these was a tall and beautifully-shaped woman, whose face and figure were those of a woman in the early twenties, but whose long, thick hair was as white as though the snows of seventy winters had drifted over it. As he returned her warm, firm hand-clasp, and looked upon her dark, resolute, and yet perfectly womanly features, the young engineer gave a slight start of recognition. She noticed this at once and said, with a smile and a quick flash from her splendid grey eyes—

"Ah! I see you recognise me. No, I am not ashamed of my portrait. I am proud of the wounds that I have received in the war with tyranny, so you need not fear to confess your recognition."

It was true that Arnold had recognised her. She was the original of the central figure of the painting which depicted the woman being flogged by the Russian soldiers.

Arnold flushed hotly at the words with the sudden passionate anger that they roused within him, and replied in a low, steady voice—

"Those who would sanction such a crime as that are not fit to live. I will not leave one stone of that prison standing upon another. It is a blot on the face of the earth, and I will wipe it out utterly!"

"There are thousands of blots as black as that on earth, and I think you will find nobler game than an obscure Russian provincial prison. Russia has cities and palaces and fortresses that will make far grander ruins than that—ruins that will be worthy monuments of fallen despotism," replied the girl, who had been introduced by the President as Radna Michaelis. "But here is some one else waiting to make your acquaintance. This is Natasha. She has no other name among us, but you will soon learn why she needs none."

Natasha was the other woman who had so keenly roused Arnold's interest. Woman, however, she hardly was, for she was seemingly still in her teens, and certainly could not have been more than twenty.

He had mixed but little with women, and during the past few years not at all, and therefore the marvellous beauty of thegirl who came forward as Radna spoke seemed almost unearthly to him, and confused his senses for the moment as some potent drug might have done. He took her outstretched hand in awkward silence, and for an instant so far forgot himself as to gaze blankly at her in speechless admiration.

She could not help noticing it, for she was a woman, and for the same reason she saw that it was so absolutely honest and involuntary that it was impossible for any woman to take offence at it. A quick bright flush swept up her lovely face as his hand closed upon hers, her darkly-fringed lids fell for an instant over the most wonderful pair of sapphire-blue eyes that Arnold had ever even dreamed of, and when she raised them again the flush had gone, and she said in a sweet, frank voice—

"I am the daughter of Natas, and he has desired me to bid you welcome in his name, and I hope you will let me do so in my own as well. We are all dying to see this wonderful invention of yours. I suppose you are going to satisfy our feminine curiosity, are you not?"

The daughter of Natas! This lovely girl, in the first sweet flush of her pure and innocent womanhood, the daughter of the unknown and mysterious being whose ill-omened name caused a shudder if it was only whispered in the homes of the rich and powerful; the name with which the death-sentences of the Terrorists were invariably signed, and which had come to be an infallible guarantee that they would be carried out to the letter.

No death-warrants of the most powerful sovereigns of Europe were more certain harbingers of inevitable doom than were those which bore this dreaded name. Whether he were high or low, the man who received one of them made ready for his end. He knew not where or when the fatal blow would be struck. He only knew that the invisible hand of the Terror would strike him as surely in the uttermost ends of the earth as it would in the palace or the fortress. Never once had it missed its aim, and never once had the slightest clue been obtained to the identity of the hand that held the knife or pistol.

Some such thoughts as these flashed one after another through Arnold's brain as he stood talking with Natasha. He saw at once why she had only that one name. It wasenough, and it was not long before he learnt that it was the symbol of an authority in the Circle that admitted of no question.

She was the envoy of him whose word was law, absolute and irrevocable, to every member of the Brotherhood; to disobey whom was death; and to obey whom had, so far at least, meant swift and invariable success, even where it seemed least to be hoped for.

Of course, Natasha's almost girlish question about the air-ship was really a command, which would have been none the less binding had she only had her own beauty to enforce it. As she spoke the President and Colston—who had only lost himself for the time behind a mask and cloak—came up to Arnold and asked him if he was prepared to give an exhibition of the powers of his model, and to explain its working and construction to the Circle at once.

He replied that everything was perfectly ready for the trial, and that he would set the model working for them in a few minutes. The President then told him that the exhibition should take place in another room, where there would be much more space than where they were, and bade him bring the box and follow him.

A door was now opened in the wall of the room remote from that by which he and Colston had entered, and through this the whole party went down a short passage, and through another door at the end which opened into a very large apartment, which, from the fact of its being windowless, Arnold rightly judged to be underground, like the Council-chamber that they had just left.

A single glance was enough to show him the chief purpose to which the chamber was devoted. The wall at one end was covered with arm-racks containing all the newest and most perfect makes of rifles and pistols; while at the other end, about twenty paces distant, were three electric signalling targets, graded, as was afterwards explained to him, to one, three, and five hundred yards range.

In a word, the chamber was an underground range for rifle and pistol practice, in which a volley could have been fired without a sound being heard ten yards away. It was here that the accuracy of the various weapons invented fromtime to time was tested; and here, too, every member of the Circle, man and woman, practised with rifle and pistol until an infallible aim was acquired. A register of scores was kept, and at the head of it stood the name of Radna Michaelis.

A long table ran across the end at which the arm-racks were, and on this Arnold laid the case containing the model, he standing on one side of the table, and the members of the Circle on the other, watching his movements with a curiosity that they took no trouble to disguise.

He opened the case, feeling something like a scientific demonstrator, with an advanced and critical class before him. In a moment the man disappeared, and the mechanician and the enthusiast took his place. As each part was taken out and laid upon the table, he briefly explained its use; and then, last of all, came the hull of the air-ship.

This was three feet long and six inches broad in its midships diameter. It was made in two longitudinal sections of polished aluminium, which shone like burnished silver. It would have been cigar-shaped but for the fact that the forward end was drawn out into a long sharp ram, the point of which was on a level with the floor of the hull amidships as it lay upon the table. Two deep bilge-plates, running nearly the whole length of the hull, kept it in an upright position and prevented the blades of the propellers from touching the table. For about half its whole length the upper part of the hull was flattened and formed a deck from which rose three short strong masts, each of which carried a wheel of thin metal whose spokes were six inclined fans something like the blades of a screw.

A little lower than this deck there projected on each side a broad, oblong, slightly curved sheet of metal, very thin, but strengthened by means of wire braces, till it was as rigid as a plate of solid steel, although it only weighed a few ounces. These air-planes worked on an axis amidships, and could be inclined either way through an angle of thirty degrees. At the pointed stern there revolved a powerful four-bladed propeller, and from each quarter, inclined slightly outwards from the middle line of the vessel, projected a somewhat smaller screw working underneath the after end of the air-planes.

The hull contained four small double-cylinder engines, one of which actuated the stern-propeller, and the other three the fan-wheels and side-propellers. There were, of course, no furnaces, boilers, or condensers. Two slender pipes ran into each cylinder from suitably placed gas reservoirs, or power-cylinders, as the engineer called them, and that was all.

Arnold deftly and rapidly put the parts together, continuing his running description as he did so, and in a few minutes the beautiful miracle of ingenuity stood complete before the wondering eyes of the Circle, and a murmur of admiration ran from lip to lip, bringing a flush of pleasure to the cheek of its creator.

"There," said he, as he put the finishing touches to the apparatus, "you see that she is a combination of two principles—those of the Aëronef and the Aëroplane. The first reached its highest development in Jules Verne's imaginary "Clipper of the Clouds," and the second in Hiram Maxim's Aëroplane. Of course, Jules Verne's Aëronef was merely an idea, and one that could never be realised while Robur's mysterious source of electrical energy remained unknown—as it still does.

"Maxim's Aëroplane is, as you all know, also an unrealised ideal so far as any practical use is concerned. He has succeeded in making it fly, but only under the most favourable conditions, and practically without cargo. Its two fatal defects have been shown by experience to be the comparatively overwhelming weight of the engine and the fuel that he has to carry to develop sufficient power to rise from the ground and progress against the wind, and the inability of the machine to ascend perpendicularly to any required height.

"Without the power to do this no air-ship can be of any use save under very limited conditions. You cannot carry a railway about with you, or a station to get a start from every time you want to rise, and you cannot always choose a nice level plain in which to come down. Even if you could the Aëroplane would not rise again without its rails and carriage. For purposes of warfare, then, it may be dismissed as totally useless.

"In this machine, as you see, I have combined the two principles. These helices on the masts will lift the dead weight of the ship perpendicularly without the slightest help from the side-planes, which are used to regulate the vessel's flight when afloat. I will set the engines that work them inmotion independently of the others which move the propellers, and then you will see what I mean."

As he spoke, he set one part of the mechanism working. Those watching saw the three helices begin to spin round, the centre one revolving in an opposite direction to the other two, with a soft whirring sound that gradually rose to a high-pitched note.

When they attained their full speed they looked like solid wheels, and then the air-ship rose, at first slowly, and then more and more swiftly, straight up from the table, until it strained hard at the piece of cord which prevented it from reaching the roof.

A universal chorus of "bravas" greeted it as it rose, and every eye became fixed on it as it hung motionless in the air, sustained by its whirling helices. After letting it remain aloft for a few minutes Arnold pulled it down again, saying as he did so—

"That, I think, proves that the machine can rise from any position where the upward road is open, and without the slightest assistance of any apparatus. Now it shall take a voyage round the room.

"You see it is steered by this rudder-fan under the stern propeller. In the real ship it will be worked by a wheel, like the rudder of a sea-going vessel; but in the model it is done by this lever, so that I can control it by a couple of strings from the ground."

He went round to the other side of the table while he was speaking, and adjusted the steering gear, stopping the engines meanwhile. Then he put the model down on the floor, set all four engines to work, and stood behind with the guiding-strings in his hands. The spectators heard a louder and somewhat shriller whirring noise than before, and the beautiful fabric, with its shining, silvery hull and side-planes, rose slantingly from the ground and darted forward down the room, keeping Arnold at a quick run with the rudder-strings tightly strained.

Like an obedient steed, it instantly obeyed the slightest pull upon either of them, and twice made the circuit of the room before its creator pulled it down and stopped the machinery.

The experiment was a perfect and undeniable success inevery respect, and not one of those who saw it had the slightest doubt as to Arnold's air-ship having at last solved the problem of aërial navigation, and made the Brotherhood lords of a realm as wide as the atmospheric ocean that encircles the globe.

As soon as the model was once more resting on the table, the President came forward and, grasping the engineer by both hands, said in a voice from which he made but little effort to banish the emotion that he felt—

"Bravo, brother! Henceforth you shall be known to the Brotherhood as the Master of the Air, for truly you have been the first among the sons of men to fairly conquer it. Come, let us go back and talk, for there is much to be said about this, and we cannot begin too soon to make arrangements for building the first of our aërial fleet. You can leave your model where it is in perfect safety, for no one ever enters this room save ourselves."

So saying the President led the way to the Council-chamber, and there, after theAriel—as it had already been decided to name the first air-ship—had been christened in anticipation in twenty-year old champagne, the Circle settled down at once to business, and for a good three hours discussed the engineer's estimate and plans for building the first vessel of the aërial fleet.

At length all the practical details were settled, and the President rose in token of the end of the conference. As he did so he said somewhat abruptly to Arnold—

"So far so good. Now there is nothing more to be done but to lay those plans before the Chief and get his authority for withdrawing out of the treasury sufficient money to commence operations. I presume you could reproduce them from memory if necessary—at any rate, in sufficient outline to make them perfectly intelligible?"

"Certainly," was the reply. "I could reproduce them infac similewithout the slightest difficulty. Why do you ask?"

"Because the Chief is in Russia, and you must go to him and place them before him from memory. They are far too precious to be trusted to any keeping, however trustworthy. There are such things as railway accidents, and other forms of sudden death, to say nothing of the Russian customs, false arrests, personal searches, and imprisonments on mere suspicion.

"We can risk none of these, and so there is nothing for it but your going to Petersburg and verbally explaining them to the Chief. You can be ready in three days, I suppose?"

"Yes, in two, if you like," replied Arnold, not a little taken aback at the unexpected suddenness of what he knew at once to be the first order that was to test his obedience to the Brotherhood. "But as I am absolutely ignorant of Russia and the Russians, I suppose you will make such arrangements as will prevent my making any innocent but possibly awkward mistakes."

"Oh yes," replied the President, with a smile, "all arrangements have been made already, and I expect you will find them anything but unpleasant. Natasha goes to Petersburg in company with another lady member of the Circle whom you have not yet seen.

"You will go with them, and they will explain everything to youen route, if they have no opportunity of doing so before you start. Now let us go upstairs and have some supper. I am famished, and I suppose every one else is too."

Arnold simply bowed in answer to the President; but one pair of eyes at least in the room caught the quick, faint flush that rose in his cheek as he was told in whose company he was to travel. As for himself, if the journey had been to Siberia instead of Russia, he would have felt nothing but pleasure at the prospect after that.

They left the Council-chamber by the passage and the ante-room, the sentry standing to attention as they passed him, each giving the word in turn, till the President came last and closed the doors behind him. Then the sentry brought up the rear and extinguished the lights as he left the passage.

Fifteen minutes later there sat down to supper, in the solidly comfortable dining-room of the upper house, a party of ladies and gentlemen who chatted through the meal as merrily and innocently as though there were no such things as tyranny or suffering in the world, and whom not the most acute observer would have taken for the most dangerous and desperately earnest body of conspirators that ever plotted the destruction, not of an empire, but of a civilisation and a social order that it had taken twenty centuries to build up.

THE DAUGHTER OF NATAS.


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