himself to? Of course the evidence of the carpenter gave some colour to the theory, but I think I can imagine a very reasonable explanation of that.
“You told me, of course, that you were down with the men yourself when they opened the bullion-room door and got out the cases, so that there could be no suspicion of them. But at the same time you told me that the breach in the Nicobar’s side had laid open the bullion-room partition, and that you might more easily have got the cases out that way. You told me, of course, that the cases couldn’t have fallen out that way because of the list of the vessel, the position of the rent in the boiler-plate, and so on. But I reflected that the day before a diver had been down alone — in fact, that his business had been with the very hole that extended partly to the bullion-room: he had to measure it. That diver might easily have got at the cases through the breach. But then, as you told me, a diver can’t bring things up from below unobserved. This diver would know this, and might therefore hide the booty below. So that I made up my mind to have a look under water before I jumped to any conclusion.
“I didn’t think it likely that he had hidden the cases, mind you. Because he would have had to dive again to get them, and would have been just as awkwardly placed in fetching them to the light of day then as ever. Besides, he couldn’t come diving here again in the company’s dress without some explanation. So what more likely than that he would make some ingenious arrangement with an accomplice, whereby he might make the gold in some way accessible to him?
“We went under water. I kept my eyes open, and observed, among other things, that the vessel was one of those well-kept ‘ swell ‘ ones on which all the hatch gratings and so on are in plain oak or teak, kept holystoned. This (with the other things) I put by in my mind in case it should be useful. When we went over the side and looked at the great gap, I saw that it would have been quite easy to get at the broken bullion-room partition from outside.”
“Yes,” remarked Merrick, “it would be no trouble at all. The ladder goes down just by the side of the breach, and any one descending by that might just step off at one side on to the jagged plating at the level of the after orlop, and reach over into the bullion safe.”
“Just so. Well, next I turned my attention to the sea-bed, which I was extremely pleased to see was of soft, slimy claystone. I walked about a little, getting farther and farther away from the vessel as I went, till I came across that clean stone which I turned over with my foot. Do you remember?”
“Yes.”
“Well, that was noticeable. It was the only clean, bare stone to be seen. Every other was covered with a green growth, and to most clumps of weed clung. The obvious explanation of this was that the stone was a new-comer — lately brought from dry land — from the shingle on the sea-shore, probably, since it was washed so clean. Such a stone could not have come a mile out to sea by itself. Somebody had brought it in a boat and thrown it over, and whoever did it didn’t take all that trouble for nothing. Then its shape told a tale; it was something of the form, rather exaggerated, of a loaf — the sort that is called a ‘ cottage ‘ — the most convenient possible shape for attaching to a line and lowering. But the line had gone, so somebody must have been down there to detach it. Also it wasn’t unreasonable to suppose that there might have been a hook on the end of that line. This, then, was a theory. Your man had gone down alone to take his measurement, had stepped into the broken side, as you have explained he could, reached into the bullion-room, and lifted the two cases. Probably he unfastened the cord, and brought them out one at a time for convenience in carrying. Then he carried the cases, one at a time, as I have said, over to that white stone which lay there sunk with the hook and line attached by previous arrangement with some confederate. He detached the rope from the stone — it was probably fixed by an attached piece of cord, tightened round the stone with what you call a timber-hitch, easily loosened — replaced the cord round the two cases, passed the hook under the cord, and left it to be pulled up from above. But then it could not have been pulled up there in broad daylight, under your very noses. The confederates would wait till night. That meant that the other end of the rope was attached to some floating object, so that it might be readily recovered. The whole arrangement was set one night to be carried away the next.”
“But why didn’t Gullen take more than two cases?”
“He couldn’t afford to waste the time, in the first place. Each case removed meant another journey to and from the vessel, and you were waiting above for his measurements. Then he was probably doubtful as to weight. Too much at once wouldn’t easily be drawn up, and might upset a small boat.
“Well, so much for the white stone. But there was more; close by the stone I noticed (although I think you didn’t) a mark in the claystone. It was a triangular depression or pit, sharp at the bottom — just the hole that would be made by the sharp impact of the square corner of a heavy box, if shod with iron, as the bullion cases are. This was one important thing. It seemed to indicate that the boxes had not been lifted directly up from the seabed, but had been dragged sideways — at all events at first — so that a sharp corner had turned over and dug into the claystone! I walked a little farther and found more indications — slight scratches, small stones displaced, and so on, that convinced me of this, and also pointed out the direction in which the cases had been dragged. I followed the direction, and presently arrived at another stone, rather smaller than the clean one. The cases had evidently caught against this, and it had been displaced by their momentum, and perhaps by a possible wrench from above. The green growth covered the part which had been exposed to the water, and the rest of the stone fitted the hole beside it, from which it had been pulled. Clearly these things were done recently, or the sea would have wiped out all the traces in the soft claystone. The rest of what I did under water of course you understood.”
“I suppose so: you took the bearings of the two stones in relation to the ship by pacing the distances.”
“That is so. I kept the figures in my head till I could make a note of them, as you saw, on paper. The rest was mere calculation. What I judged had happened was this. Gullen had arranged with somebody, identity unknown, but certainly somebody with a boat at his disposal, to lay the line, and take it up the following night. Now anything larger than a rowing boat could not have got up quite so close to you in the night (although your tug was at the other end of the wreck) without a risk of being seen. But no rowing boat could have dragged those cases forcibly along the bottom; they would act as an anchor to it. Therefore this was what had happened. The thieves had come in a large boat — a fishing smack, lugger, or something of that sort — with a small boat in tow. The sailing boat had lain to at a convenient distance, in the direction in which it was afterwards to go, so as to save time if observed, and a man had put off quietly in the small boat to pick up the float, whatever it was. There must have been a lot of slack line on this for the purpose, as also for the purpose of allowing the float to drift about fairly freely, and not attract attention by remaining in one place. The man pulled off to the sailing boat, and took the float and line aboard. Then the sailing boat swung off in the direction of home, and the line was hauled in with the plunder at the end of it.”
“One would think you had seen it all — or done it,” Merrick remarked, with a laugh.
“Nothing else could have happened, you see. That chain of events is the only one that will explain the circumstances. A rapid grasp of the whole circumstances and a perfect appreciation of each is more than half the battle in such work as this. Well, you know I got the exact bearings of the wreck on the chart, worked out from that the lay of the two stones with the scratch marks between, and then it was obvious that a straight line drawn through these and carried ahead would indicate, approximately, at any rate, the direction the thieves’ vessel had taken. The line fell on the coast close by the village of Lostella — indeed that was the only village for some few miles either way. The indication was not certain, but it was likely, and the only one available, therefore it must be followed up.”
“And
