When we left him last he had just found on the floor of his host's private library one of the tiny paper pellets which he had dropped purposely from his pocket when blindfolded the previous night. The finding of this pellet he looked on as proof-positive that the entrance to the hiding-place of the Diamond must be in that room. His discovery was an important one. It was his first step towards that goal whither all his hopes and wishes now tended. It placed him at once on a certain vantage ground. Still he was puzzled by the consideration of what his second step ought to be. For some time he could not see his way at all.
On the pretence of wanting some particular volume from its shelves he contrived once and again to visit the private library while Platzoff was engaged elsewhere. But he could not visit it without first asking permission, owing to the simple fact of its door being always kept locked. The required permission was grudgingly granted by Platzoff--he could see that, also that it would not be wise to court the privilege too often. Indeed, it was a privilege that proved of little or no service, either Cleon or Jasmin being sent with him to unlock and relock the door, and evidently having secret instructions not to leave the library so long as he was in it. While looking for the required volume he could merely take a few careless glances around, and such glances merely served to show him that the line of book-shelves was unbroken except by the two doorways and the fireplace. He had not, indeed, been sanguine enough to expect that such a casual examination would reveal to him the secret entrance that led to the cavern. But he had half hoped that by some faint sign, by some insignificant token, which to those not in the secret would seem utterly meaningless, he might be able to seize on the first hint of the wished-for clue. But in so far he was doomed to disappointment. No sign nor token of the faintest kind was visible to his quick-searching eyes.
So day after day came and went till but two days remained before the time fixed for his departure, and it seemed to him that he might just as well have never heard of the existence of the Great Mogul Diamond, much less have been favoured with the sight of it, for any use that he could make of his knowledge. Turn the subject in his mind which way he would, in this light and in that, there seemed no egress from the difficulty in which he now found himself. But however much Captain Ducie might be inwardly chagrined he betrayed no traces of it on the surface. On the contrary, he had never striven more assiduously to make himself agreeable to his host than he did during this period of his deepest mortification. In every way that he could possibly think of he tried to make himself indispensable to Platzoff--or, if not indispensable, such a pleasant element, such a piquant seasoning to the course of everyday life at Bon Repos, that the Russian should part from him with regret, and nothing be wanting to secure another invitation to the same roof in time to come. These exertions were not without their reward--a more immediate reward than he had ventured to hope for. On the morning of the day but one before that of his departure, as he and Platzoff were sitting together in a summerhouse that overlooked the lake, said the captain, after a pause in the conversation:--"Three days hence, instead of having this pleasant scene to gaze upon at will, I shall have nothing but London's dusty streets with which to solace my eyes. But, in any case, I shall have a store of pleasant recollections to take back with me."
"Is the time of your leaving me so near?" said the Russian. "In the pleasure of your society I had almost forgotten that such a time must necessarily come. But why go, cher ami? Why not extend your visit till--till you are tired of us and our quiet life, if, indeed, you are not that already?"
Captain Ducie shook his head. "My sojourn at Bon Repos has been a very pleasant one," he said, "and I am by no means tired of it. But other engagements claim my attention, and I am afraid that I dare not make any longer stay here."
"See, then. You can do this to oblige an old man," said Platzoff. "Of late I have not been well--in fact, I have never quite got over that accident on the railway. My doctor down here does not seem to understand what ails me, and I have had some thought of going up to London for the sake of better advice. I cannot, however, go for three weeks: there are certain matters that must be attended to before I can leave Bon Repos even for a few days. See, now. You shall put off your journey for three weeks, and then we will go up to town together. Que dites vous?"
Of course Captain Ducie could do nothing but accede as gracefully as possible to his host's request. He was, in truth, very well pleased to accede to it, even although the three weeks in question might do nothing towards the accomplishment of his secret hopes. Bon Repos was decidedly preferable to two stuffy rooms in a London back street, especially at a season of the year when the hegira of the fashionable world was just setting in. He would stay where he was as long as it was possible to do so.
There had been no conversation between Ducie and Platzoff respecting the Diamond since the night they two had visited the cavern together. Ducie had tried to broach the subject once or twice, but Platzoff had fought so shy of it that the captain had not ventured to proceed, but had turned the conversation into other channels. It seemed to Ducie as if Platzoff half repented having taken him so fully into his confidence. It was evidently not his intention to enlighten him any further in the matter.
The first week of the three had come to an end. According to custom, Ducie and Platzoff were sitting together on a certain evening in the smoke-room. It was one of the Russian's drashkil nights. He had been smoking hard and fast, and was already in a state of coma, lost to all outward influences. Ducie looked at his watch, debating within himself whether it would not be wiser on his part to go off to bed than to sit there any longer with his unconscious host. And yet it was only half-past ten--rather early for bed. He sat staring at his host, and toying absently with his watch-guard, when, clear and vivid as a shaft of lightning, there flashed across his brain a thought that struck him breathless for one moment, and the next startled him into the most intense life. He rose noiselessly to his feet, and stood for a full minute with his fingers pressed to his eyes, thinking, so it seemed to him, as he had never thought before.
That one minute sufficed to elaborate the scheme that had come to him as suddenly and as startlingly as a veritable inspiration of genius. Had his thoughts clothed themselves in words, they would have expressed themselves somewhat after this fashion:--