"That is more or less it," Deschamps replied. "I am not concerned at the moment with anything but the bare mechanical operation. The whirling of the wheel at the bottom, the opposite course of the ball, and the triangular silver stars which break it, all make it a pure matter of chance into which apartment upon the wheel the ball is going to fall. It is obvious, therefore, that if by some means the player could determine into which slot the ball is to fall, he would have the bank at his mercy."

"Precisely," Basil said.

"Very well, then. It is a means by which this may be attained that I have discovered. Of course, you, as an electrical engineer, can easily see that a roulette wheel might easily be constructed by the bank by which it could control the falling of the ball and so prevent players who had backed a particular number from winning. This has often been done by dishonest people who run private gambling h.e.l.ls. Upon the surface everything appears all right, but, of course, an expert examination would very speedily result in the discovery of the secret mechanism--generally, by the way, electrical. Wires can be hidden in the leg of the table upon which the wheel stands, and controlled by the foot of the croupier who spins it. But never before--and I wish you to keep this point most carefully in mind--has it been possible for the player to control the wheel in action without the connivance of the croupier or the bank. Now listen." He began to address himself now more particularly to the Carnet Freres.

"The first detail in my plan is that the little ivory ball, while remaining to all appearance a solid ball of ivory, is not really so. It will contain a core or heart of steel. The very finest workmanship alone could accomplish this without any possibility of detection. I a.s.sume--am I right in a.s.suming?--that our friends, Messieurs Charles and Edouard, could make a ball or b.a.l.l.s of this description."

The two little men, who had been listening with rigid attention, spoke to one another rapidly for a moment or two, using technical terms which the others could not understand.

Then Brother Charles looked up. "We can do it," he said proudly. "It will be difficult, very difficult. First of all, there is the weight to be considered, for the ball must not exceed a normal weight. Then there must be a special quality of ivory, and work in turning and hollowing so extraordinarily fine and delicate that perhaps only one of the Indian or Chinese carvers could do it so that the operation showed no trace. I am certain that no one in France but myself and my brother are capable of this feat, but you may rest content--it is not beyond our powers!"

The little man concluded with quiet pride, and Deschamps showed unmistakable relief.

"I was certain of it," he said, "but, naturally, I had some little anxiety. Everything, in the first instance, depends upon that."

"We then have our prepared ball or b.a.l.l.s--for a whole set must be made.

The next point is the peculiar construction of the rotating wheel upon which the slots are fixed. Then, you, Basil, will immediately understand, but I must explain it carefully to our friends, they will have to work under my instructions, and with material which I supply.

The prepared wheel will be constructed quite differently from the ordinary ones, though it will look exactly the same, when painted with the numbers. Each slot, messieurs, will be constructed of metal varying very slightly in composition. To all outward appearance the metal will be just the ordinary tin amalgam generally employed. In reality, as far as the metal goes, each slot will have, so to speak, a personality of its own--a certain power of receptivity of certain influences which no other slot has."

He stopped for a moment, and suddenly Basil Gregory rose from his chair, and gave a great shout of excitement. A glimmering, a faint glimmering, of the stupendous idea had come to him, and he trembled all over with excitement.

The two little men were no less excited than he, though as yet they were in the dark.

Deschamps made a movement with his hand, Basil sat down again, and the Frenchman went on speaking.

"My colleague here," he said, "is already beginning to grasp the idea.

In a very few more words you will understand it also. I mentioned wireless telegraphy to you just now. I also told you that my friend and I had improved enormously upon the present system, though, owing to lack of money, we have never been able as yet to place our invention upon the market or get it recognised, while if we took it to quarters where it would be appreciated and understood, we should be robbed of nearly all the profits, as has happened with many another inventor.

"Well, then, messieurs, the invention of my friend and myself--I speak purposely in non-technical terms--makes it possible for the mysterious electrical power which sends messages over thousands of miles of s.p.a.ce--the Hertzian waves in short--to penetrate through any amount of material resistance in the form of the walls of buildings, or barriers of any kind. Marconi has already accomplished something of this; we have perfected it. Now, in wireless telegraphy it is already possible to 'tune' sets of instruments so that the message sent at one end of the transmitter will only be received at the other by a similarly tuned receiver, this preventing the message being picked up by other receivers as it flies through s.p.a.ce. I am about to apply this principle, greatly facilitated by our invention, to the slots of the roulette wheel. Each slot will be tuned separately from its fellow. Having got thus far, let me explain to you that, by means of the Hertzian waves, the operator will be able to turn a slot into a temporary magnet of low power at any moment he desires. That is to say, that when the prepared wheel is being used upon the tables at Monte Carlo, an operator with his instrument may be three or four hundred yards away in the upper room of a neighbouring hotel, or, if necessary, two miles away up upon the mountains of the Maritime Alps, and will be able to turn any slot he desires into a magnet for just as long a period as he wishes it to remain so. There will be no visible connection between the distant operator and the wheel. It is absolutely impossible that the people cl.u.s.tered round the wheel can know what is going on. The great secret, silent power of electricity will be at work, and yet entirely unsuspected and unknown."

He paused again, and triumph dawned upon his face as he saw that now not only did Basil Gregory thoroughly understand the plan, but that the brothers Carnet also had grasped the idea. Their faces were blazing with amazement, their bodies tense and rigid, there was no sound in the workshop but that of his own voice.

"The rest is easy to explain," he said. "If, say, at a given moment, the slot painted seven is converted into a low-power magnet directly the wheel begins to revolve, then, as a natural consequence, as soon as the velocity of the ball begins to die away, and the attractive power of the magnet, which slot number seven has become, proves greater than the impelling force of the ball, the ball which has a steel core will fall into slot number seven.

"You will observe, then, that the unseen operator any distance from the Casino is absolute master of the play at the particular table where the prepared wheel is.

"His confederate will play at this table. He and the operator will carry watches that are absolutely and utterly reliable, and which are synchronised to a hundredth second of time. A course of play is determined on. A sequence of certain numbers is agreed upon between the two. Let us say that the player enters the rooms at twelve o'clock in the morning and secures his place at the special table. At ten minutes past twelve to the instant it is agreed that number seven, let us say, is to receive the force of the Hertzian waves for a certain definite period. As a usual thing, so rapid is the paying out and gathering in of money at the tables at Monte Carlo, the wheel is spun every minute and a half. Of course, if the stakes are very high, or if there is a dispute, a coup may take a little longer. That, however, is a fair working average. For a little less than a minute and a half, then, from the time agreed upon, i.e., ten minutes past twelve, seven will remain a magnet.

For that particular spin seven must infallibly prove the winner. The thing can be repeated over and over again."

"It is marvellous!" the brothers shouted out in chorus. "It will be impossible to detect. Monsieur, you are the greatest mechanical genius the world has ever seen!"

It was a great moment for Emile Deschamps. All the theatrical instincts so deeply implanted within him were gratified. To watch the faces of his audience, to see the dawn of understanding and admiration as he talked, had been to him like cool water to one in the desert.

He stood still now, one hand upon his heart, and bowed. He had no thought of mockery, the gesture was perfectly spontaneous and sincere.

He turned to Basil.

"And you, my friend, what do you think of it?" he asked.

Basil started. He had been thinking furiously, and the question came unexpectedly.

"It is, of course, extremely brilliant," he said. "Naturally I can see that even more readily than our friends here. I don't believe any brain but yours, Emile, would ever have thought of it. Properly worked, and there are a good many details I should like to discuss with you, it's almost certain the scheme will succeed. But----"

"Ah," Deschamps burst in, "the usual English reservation! The invariable 'but' of caution! What is it now, you cold-blooded islander?"

"Oh, it is not caution," Basil answered. "Haven't I just told you that the thing must succeed with a few modifications upon your original idea?

It is the morality of the thing I am thinking of."

Deschamps had sat down. He jumped up now like a Jack-in-the-box.

"_Tiens!_" he cried. "Morality? Morality?"

"I thought you had forgotten the meaning of the word," Basil answered dryly. "It seems to me--I only offer the opinion for what it is worth--that while this little plan is about as alluring a proposition as I ever heard, one of the most elementary problems of life has been quite lost sight of. We are going to steal--to put it quite frankly. It is an iridium-pointed, hot-pressed, wire-wove, jewelled-in-every-hole sort of steal, I know, but it is a steal all the same, isn't it? I am open to conviction, of course, and, by the way, if anything goes wrong, conviction is just what will occur. We have a little poem in England which sums up the question in a nutsh.e.l.l--

He who prigs what isn't his'n, When he's cotched will go to prison;

or, to put it in simpler form still, 'the penalty for abstracting quids by electricity will be quod'--you are a Latin scholar, I believe, Emile?"

The Frenchman made an impatient and angry gesture of his hands.

"There is no time for _blague_," he said, "with your quids and your quods. I know nothing of your piggish English play upon words. Of course, if it is the fear of discovery that deters you, and the possibilities of arrest, well----"

He did not conclude, but shrugged his shoulders, and puffed out his lips with a peculiarly French contempt.

Basil was quite unmoved. "It is not that," he said, "as you know very well, Emile. I would risk anything upon any chance. Our lives at the present moment are very like two puddings in a fog. Prison could not be much worse. But I do not quite see how one is going to reconcile this marvellously ingenious plan of yours with ordinary morals. There have been lots of times when you and I have wanted a bottle of wine or a packet of cigarettes very badly, and hadn't the money to pay for them.

If I had proposed to you to take a bottle of chambertin while the wine-merchant was not looking--well!"

The two little Frenchmen had been listening with keen attention to this dialogue. Basil's English irony had been lost upon them, but they understood the main lines of his objections well enough.

It was Brother Edouard who came to the rescue.

"Permit me to say a word," he interrupted in his gentle, high-pitched voice. "The cases of robbing a wine-merchant and the Administration of Monte Carlo have not the slightest a.n.a.logy. Your premises are false, Monsieur Gregoire. This organisation at Monte Carlo is simply a soulless machine for the making of money by exploiting one of the baser pa.s.sions of men. I and my brother--I freely confess it--have been parts of that machine for years. But you know the sad event"--his voice trembled a little--"which opened our eyes. We said to each other, 'If our hopes in life have all been utterly swept away in an instant by the Casino at Monte Carlo, how many other homes have been ruined, young lives sacrificed, prospects blighted?' A soldier who a.s.sists to exterminate, or, at any rate, to hara.s.s and injure a dangerous and unfriendly tribe of savages is generally looked upon as doing a fine and meritorious thing. Nor does he disdain to take the pay of his country for so doing.

You and Monsieur Deschamps will be in exactly the same case. You will be seriously injuring the Casino. It may be that when the idea is developed roulette will become impossible, though that is only a side issue, and also--here you must listen to me carefully--you are not proposing to obtain a large sum of money for the mere gratification of low pleasures, to acquire a soulless ease and comfort. You have invented something which will be of the highest benefit to mankind. Want of fortune alone prevents you conferring that benefit upon the world. As inventors, it is your duty--at least, so it appears to me--to take advantage of the opportunity which the genius of Monsieur Deschamps has provided. No one will be hurt except people who can well afford to suffer."

His voice had gathered strength as he went on, and as he concluded there was an almost prophetic note in it, a gravity and seriousness of conviction which had an instant effect upon Basil Gregory's wavering mind.

He thought for a minute, and then looked up.

"So be it," he said. "You have convinced me, though I will say I was ready enough to be convinced. We will try it. Like all other gamblers, we will risk everything upon a single throw."

As if by common consent, they all rose to their feet.

"And now," said Brother Charles, who had hitherto been silent, "let us form ourselves into a committee of ways and means."

Deschamps' face grew pale. "_Mon Dieu!_" he cried, "fool that I am! I have been carried away by the splendour of the prospect, and have forgotten the most essential fact of all. Our friends here"--he was speaking to Basil--"can prepare the wheel with my a.s.sistance. But how about the apparatus, which, as you know, is costly enough for ordinary purposes? The particular apparatus I shall want with all our own modifications and specialities will cost about five thousand francs. And then there is the getting to Monte Carlo, the putting up at an expensive hotel to avoid suspicion--for the Administration has its spies and detectives everywhere. It may be necessary to bribe, a thousand emergencies may occur, which only money can overcome."

He dived one hand into the pocket of his trousers, and withdrew four coins. He flung them on the floor with a curse.

"Three francs fifty!" he cried; "three francs fifty! Basil, I am a fool and a dreamer! You can preserve your morality unspotted, after all!"