Captain Ducie had been six weeks at Bon Repos; his visit would come to a close in the course of three or four days, but he was still as ignorant of the hiding-place of the Diamond as on that evening when he learned for the first time that M. Platzoff had such a treasure in his possession.

Since the completion of his translation of the stolen MS. he had dreamed day and night of the Diamond. It was said to be worth a hundred and fifty thousand pounds. If he could only succeed in appropriating it, what a different life would be his in time to come! In such a case, he would of course be obliged to leave England for ever. But he was quite prepared to do that. He was without any tie of kindred or friendship that need bind him to his native land. Once safe in another hemisphere, he would dispose of the Diamond, and the proceeds would enable him to live as a gentleman ought to live for the remainder of his days. Truly, a pleasant dream.

But it was only a dream after all, as he himself in his cooler moments was quite ready to acknowledge. It was nothing but a dream even when Platzoff wrung from him an unreluctant consent to extend his visit at Bon Repos for another six weeks. If he stayed for six months, there seemed no likelihood that at the end of that time he would be one whit wiser on the one point on which he thirsted for information than he was now. Still, he was glad for various reasons to retain his pleasant quarters a little while longer.

Truth to tell, in Captain Ducie M. Platzoff had found a guest so much to his liking that he could not make up his mind to let him go again. Ducie was incurious, or appeared to be so; he saw and heard, and asked no questions. He seemed to be absolutely destitute of political principles, and therein he formed a pleasant contrast both to M. Platzoff himself and to the swarm of foreign gentlemen who at different times found their way to Bon Repos. He was at once a good listener and a good talker. In fine, he made in every way so agreeable, and was at the same time so thorough a gentleman that Platzoff was as glad to retain him as he himself was pleased to stay.

Three out of the Captain's second term of six weeks had nearly come to an end when on a certain evening, as he and Platzoff sat together in the smoke-room, the latter broached a subject which Ducie would have wagered all he possessed—though that was little enough—that his host would have been the last man in the world even to hint at.

"I think I have heard you say that you have a taste for diamonds and precious stones," remarked Platzoff. Ducie had hazarded such a remark on one or two occasions as a quiet attempt to draw Platzoff out, but had only succeeded in eliciting a little shrug and a cold smile, as though for him such a statement could have no possible interest.

"If I have said so to you I have only spoken the truth," replied Ducie. "I am passionately fond of gems and precious stones of every kind. Have you any to show me?"

"I have in my possession a green diamond said to be worth a hundred and fifty thousand pounds," answered the Russian quietly.

The simulated surprise with which Captain Ducie received this announcement was a piece of genuine comedy. His real surprise arose from the fact of Platzoff having chosen to mention the matter to him at all.

"Great heaven!" he exclaimed. "Can you be in earnest? Had I heard such a statement from the lips of any other man than you, I should have questioned either his sanity or his truth."

"You need not question either one or the other in my case," answered Platzoff, with a smile. "My assertion is true to the letter. Some evening when I am less lazy than I am now, you shall see the stone and examine it for yourself."

"I take it as a great proof of your friendship for me, monsieur," said Ducie warmly, "that you have chosen to make me the recipient of such a confidence."

"It is a proof of my friendship," said the Russian. "No one of my political friends—and I have many that are dear to me, both in England and abroad—is aware that I have in my possession so inestimable a gem. But you, sir, are an English gentleman, and my friend for reasons unconnected with politics; I know that my secret will be safe in your keeping."

Ducie winced inwardly, but he answered with grave cordiality, "The event, my dear Platzoff, will prove that your confidence has not been misplaced."

After this, the Russian went on to tell Ducie that the MS. lost at the time of the railway accident had reference to the great Diamond; that it contained secret instructions, addressed to a very dear friend of the writer, as to the disposal of the Diamond after his, Platzoff's, death; all of which was quite as well known to Ducie as to the Russian himself; but the Captain sat with his pipe between his lips, and listened with an appearance of quiet interest that impressed his host greatly.

That night Ducie's mind was too excited to allow of sleep. He was about to be shown the great Diamond; but would the mere fact of seeing it advance him one step towards obtaining possession of it? Would Platzoff, when showing him the stone, show him also the place where it was ordinarily kept? His confidence in Ducie would scarcely carry him as far as that. In any case, it would be something to have seen the Diamond, and for the rest, Ducie must trust to the chapter of accidents and his own wits. On one point he was fully determined—to make the Diamond his own at any cost, if the slightest possible chance of doing so were afforded him. He was dazzled by the magnitude of the temptation; so much so, indeed, that he never seemed to realise in his own mind the foulness of the deed by which alone it could become his property. Had any man hinted that he was a thief, either in act or intention, he would have repudiated the term with scorn—would have repudiated it even in his own mind, for he made a point of hoodwinking and cozening himself, as though he were some other person whose good opinion must on no account be forfeited.

Captain Ducie awaited with hidden impatience the hour when it should please M. Platzoff to fulfil his promise. He had not long to wait. Three evenings later, as they sat in the smoking-room, said Platzoff: "To-night you shall see the Great Hara Diamond. No eyes save my own have seen it for ten years. I must ask you to put yourself for an hour or two under my instructions. Are you minded so to do?"

"I shall be most happy to carry out your wishes in every way," answered Ducie. "Consider me as your slave for the time being."

"Attend, then, if you please. This evening you will retire to your own rooms at eleven o'clock. Precisely at one-thirty a.m., you will come back here. You will be good enough to come in your slippers, because it is not desirable that any of the household should be disturbed by our proceedings. I have no further orders at present."

"Your lordship's wishes are my commands," answered Ducie, with a mock salaam.

They sat talking and smoking till eleven; then Ducie left his host as if for the night. He lay down for a couple of hours on the sofa in his dressing-room. Precisely at one-thirty he was on his way back to the smoke-room, his feet encased in a pair of Indian mocassins. A minute later he was joined by Platzoff in dressing-gown and slippers.

"I need hardly tell you, my dear Ducie," began the latter, "that with a piece of property in my possession no larger than a pigeon's egg, and worth so many thousands of pounds, a secure place in which to deposit that property (since I choose to have it always near me) is an object of paramount importance. That secure place of deposit I have at Bon Repos. This you may accept as one reason for my having lived in such an out-of-the-world spot for so many years. It is a place known to myself alone. After my death it will become known to one person only—to the person into whose possession the Diamond will pass when I shall be no longer among the living. The secret will be told him that he may have the means of finding the Diamond, but not even to him will it become known till after my decease. Under these circumstances, my dear Ducie, you will, I am sure, excuse me for keeping the hiding-place of the Diamond a secret still—a secret even from you. Say—will you not?"

With a malediction at his heart, but with a smile on his lips, Captain Ducie made reply. "Pray offer no excuses, my dear Platzoff, where none are needed. What I want is to see the Diamond itself, not to know where it is kept. Such a piece of information would be of no earthly use to me, and it would involve a responsibility which, under any circumstances, I should hardly care to assume."

"It is well; you are an English gentleman," said the Russian, with a ceremonious inclination of the head, "and your words are based on wisdom and truth. It is necessary that I should blindfold you: oblige me with your handkerchief."

Ducie with a smile handed over his handkerchief, and Platzoff proceeded to blindfold him—an operation which was rapidly and effectually performed by the deft fingers of the Russian.

"Now, give me your hand and come with me, but do not speak till you are spoken to."

So Ducie laid a finger in the Russian's thin, cold palm, and the latter, taking a small bronze hand-lamp, conducted his bandaged companion from the room.

In two minutes after leaving the smoke-room Ducie's geographical ideas of the place were completely at fault. Platzoff led him through so many corridors and passages, turning now to the right hand, and now to the left—he guided him up and down so many flights of stairs, now of stone and now of wood, that he lost his reckoning entirely and felt as though he were being conducted through some place far more spacious than Bon Repos. He counted the number of stairs in each flight that he went up or down. In two or three cases the numbers tallied, which induced him to think that Platzoff was conducting him twice over the same ground, in order perhaps the more effectually to confuse his ideas as to the position of the place to which he was being led.

After several minutes spent thus in silent perambulation of the old house, they halted for a moment while Platzoff unlocked a door, after which they passed forward into a room, in the middle of which Ducie was left standing while Platzoff relocked the door, and then busied himself for a minute in trimming the lamp he had brought with him, which had been his only guide through the dark and silent house, for the servants had all gone to bed more than an hour ago.

Ducie, thus left to himself for a little while, had time for reflection. The floor on which he was standing was covered with a thick, soft carpet, consequently he was in one of the best rooms in the house. The atmosphere of this room was penetrated with a very faint aroma of pot-pourri, so faint that unless Captain Ducie's nose had been more than ordinarily keen he would never have perceived it. To the best of his knowledge there was only one room in Bon Repos that was permeated with the peculiar scent of pot-pourri. That room was M. Platzoff's private study, to which access was obtained through his bed-room. Ducie had been only twice into this room, but he remembered two facts in connection with it. First, the scent already spoken of; secondly, that besides the door which opened into it from the bed-room, there was another door which he had noticed as being shut and locked both times that he was there. If the room in which they now were was really M. Platzoff's study, they had probably obtained access to it through the second door.

While silently revolving these thoughts in his mind, Captain Ducie's fingers were busy with the formation of two tiny paper pellets, each no bigger than a pea. Unseen by Platzoff, he contrived to drop these pellets on the carpet.

"I must really apologise," said the Russian, next moment, "for keeping you waiting so long; but this lamp will not burn properly."

"Don't hurry yourself on my account," said Ducie. "I am quite jolly. My eyes are ready bandaged; I am only waiting for the axe and the block."

"We are not going to dispose of you in quite so summary a fashion," said the Russian. "One minute more and your eyesight shall be restored to you."

Ducie's quick ears caught a low click, as though someone had touched a spring. Then there was a faint rumbling, as though something were being rolled back on hidden wheels.

"Lend me your hand again, and bend that tall figure of yours. Step carefully. There is another staircase to descend—the last and the steepest of all."

Keeping fast hold of Platzoff's hand, Ducie followed slowly and cautiously, counting the steps as he went down. They were of stone, and were twenty-two in number. At the bottom of the staircase another door was unlocked. The two passed through, and the door was shut and relocked behind them.

"Be blind no longer!" said Platzoff, taking off the handkerchief and handing it to Ducie, with a smile. A few seconds elapsed before the latter could discern anything clearly. Then he saw that he was in a small vaulted chamber about seven feet in height, with a flagged floor, but without furniture of any kind save a small table of black oak on which Platzoff's lamp was now burning. The atmosphere of this dungeon had struck him with a sudden chill as he went in. At each end was a door, both of iron. The one that had opened to admit them was set in the thick masonry of the wall; the one at the opposite end seemed built into the solid rock.

"Before we go any farther," said Platzoff, "I may as well explain to you how it happens that a respectable old country house like Bon Repos has such a suspicious-looking hiding-place about its premises. You must know that I bought the house, many years ago, of the last representative of an old North-country family. He was a bachelor, and in him the family died out. Three years after I had come to reside here the old man, at that time on his death-bed, sent me a letter and a key. The letter revealed to me the secret of the place we are now exploring, of which I had no previous knowledge; the key is that of the two iron doors. It seems that the old man's ancestors had been deeply implicated in the Jacobite risings of last century. The house had been searched several times, and on one occasion occupied by Hanoverian troops. As a provision against such contingencies, this hiding-place (a natural one as far as the cavern beyond is concerned, which has probably existed for thousands of years) was then first connected with the interior of the house, and rendered practicable at a moment's notice; and here on several occasions certain members of the family, together with their plate and title-deeds, lay concealed for weeks at a time. The old gentleman gave me a solemn assurance that the secret existed with him alone; all who had been in any way implicated in the earlier troubles having died long ago. As the property had now become mine by purchase, he thought it only right that before he died these facts should be brought to my knowledge. You may imagine, my dear Ducie, with what eagerness I seized upon this place as a safe depository for my diamond, which, up to this time, I had been obliged to carry about my person. And now, forward to the heart of the mystery!"

Having unlocked and flung open the second iron door, Platzoff took up his lamp, and, closely followed by Ducie, entered a narrow winding passage in the rock. After following this passage, which tended slightly downwards for a considerable distance, they emerged into a large cavernous opening in the heart of the hill.

Platzoff's first act was, by means of a long crook, to draw down within reach of his hand a large iron lamp that was suspended from the roof by a running chain. This lamp he lighted from the hand-lamp he had brought with him. As soon as released, it ascended to its former position, about ten feet from the ground. It burned with a clear white flame that lighted up every nook and cranny of the place. The sides of the cave were of irregular formation. Measuring by the eye, Ducie estimated the cave to be about sixty yards in length, by a breadth, in the widest part, of twenty. In height it appeared to be about forty feet. The floor was covered with a carpet of thick brown sand, but whether this covering was a natural or an artificial one Ducie had no means of judging. The atmosphere of the place was cold and damp, and the walls in many places dripped with moisture; in other places they scintillated in the lamplight as though thousands of minute gems were embedded in their surface.

In the middle of the floor, on a pedestal of stones loosely piled together, was a hideous idol, about four feet in height, made of wood, and painted in various colours. In the centre of its forehead gleamed the great Diamond.

"Behold!" was all that Platzoff said, as he pointed to the idol. Then they both stood and gazed in silence.

Many contending emotions were at work just then in Ducie's breast, chief of which was a burning, almost unconquerable desire to make that glorious gem his own at every risk. In his ear a fiend seemed to be whispering.

"All you have to do," it seemed to say, "is to grip old Platzoff tightly round the neck for a couple of minutes. His thread of life is frail and would be easily broken. Then possess yourself of the Diamond and his keys. Go back by the way you came and fasten everything behind you. The household is all a-bed, and you could get away unseen. Long before the body of Platzoff would be discovered, if indeed it were ever discovered, you would be far away and beyond all fear of pursuit. Think! That tiny stone is worth a hundred and fifty thousand pounds."

This was Ducie's temptation. It shook him inwardly as a reed is shaken by the wind. Outwardly he was his ordinary quiet, impassive self, only gazing with eyes that gleamed on the gleaming gem, which shone like a new-fallen star on the forehead of that hideous image.

The spell was broken by Platzoff, who, going up to the idol, and passing his hand through an orifice at the back of the skull, took the Diamond out of its resting-place, close behind the hole in the forehead, through which it was seen from the front. With thumb and forefinger he took it daintily out, and going back to Ducie dropped it into the outstretched palm of the latter.

Ducie turned the Diamond over and over, and held it up before the light between his forefinger and thumb, and tried the weight of it on his palm. It was in the simple form of a table diamond, with only sixteen facets in all, and was just as it had left the fingers of some Indian cutter, who could say how many centuries ago! It glowed with a green fire, deep, yet tender, that flashed through its facets and smote the duller lamplight with sparkles of intense brilliancy. This, then, was the wondrous gem which for reign after reign was said to have been regarded as their choicest possession by the great lords of Hyderabad. Ducie seemed to be examining it most closely; but, in truth, at that very moment he was debating in his own mind the terrible question of murder or no murder, and scarcely saw the stone itself at all.

"Ami, you do not seem to admire my Diamond!" said the Russian presently, with a touch of pathos in his voice.

Ducie pressed the Diamond back into Platzoff's hands. "I admire it so much," said he, "that I cannot enter into any commonplace terms of admiration. I will talk to you to-morrow respecting it. At present I lack fitting words."

The Russian took back the stone, pressed it to his lips, and then went and replaced it in the forehead of the idol.

"Who is your friend there?" said Ducie, with a desperate attempt to wrench his thoughts away from that all-absorbing temptation.

"I am not sufficiently learned in Hindu mythology to tell you his name with certainty," answered Platzoff. "I take him to be no less a personage than Vishnu. He is seated upon the folds of the snake Jesha, whose seven heads bend over him to afford him shade. In one hand he holds a spray of the sacred lotus. He is certainly hideous enough to be a very great personage. Do you know, my dear Ducie," went on Platzoff, "I have a very curious theory with regard to that Hindu gentleman, whoever he may be. Many years ago he was worshipped in some great Eastern temple, and had priests and acolytes without number to attend to his wants; and then, as now, the great Diamond shone in his forehead. By some mischance the Diamond was lost or stolen—in any case, he was dispossessed of it. From that moment he was an unhappy idol. He derived pleasure no longer from being worshipped, he could rest neither by night nor day—he had lost his greatest treasure. When he could no longer endure this state of wretchedness he stole out of the temple one fine night unknown to anyone, and set out on his travels in search of the missing Diamond. Was it simple accident or occult knowledge, that directed his wanderings after a time to the shop of a London curiosity dealer, where I saw him, fell in love with him, and bought him? I know not: I only know that he and his darling Diamond were at last re-united, and here they have remained ever since. You smile as if I had been relating a pleasant fable. But tell me, if you can, how it happens that in the forehead of yonder idol there is a small cavity lined with gold into which the Diamond fits with the most exact nicety. That cavity was there when I bought the idol and has in no way been altered since. The shape of the Diamond, as you have seen for yourself, is rather peculiar. Is it therefore possible that mere accident can be at the bottom of such a coincidence? Is not my theory of the Wandering Idol much more probable as well as far more poetical? You smile again. You English are the greatest sceptics in the world. But it is time to go. We have seen all there is to be seen, and the temperature of this place will not benefit my rheumatism."

So the lamp was put out and Idol and Diamond were left to darkness and solitude. In the vaulted room, at the entrance to the winding way that led to the cavern, Ducie's eyes were again bandaged. Then up the twenty-two stone stairs, and so into the carpeted room above, where was the scent of pot-pourri. From this room they came, by many passages and flights of stairs, back to the smoking-room, where Ducie's bandage was removed. One last pipe, a little desultory conversation, and then bed.

M. Platzoff being out of the way for an hour or two next afternoon, Captain Ducie contrived to pay a surreptitious visit to his host's private study. On the carpet he found one of the two paper pellets which he had dropped from his fingers the previous evening. There, too, was the same faint, sickly smell that had filled his nostrils when the handkerchief was over his eyes, which he now traced to a huge china jar in one corner, filled with the dried leaves of flowers gathered long summers before.