"But that only puzzled me more than ever, for the lantern and cylinder were now pointing straight at old Congleton’s bed. Would you believe it?—I didn’t at first think of turning the table round! Of course it wasn’t a fixture, and when I did think of it I saw through the whole scheme. Turned round, the lantern pointed through the window. The cylinder was a clever notion. It would prevent the light from the bull’s-eye spreading, so that while it would be seen a good distance out at sea, it wouldn’t attract notice in the neighborhood, except that a faint glow might be seen from below. But the Folly wasn’t in sight from the village, and there’d be precious few of the ordinary country folk who’d care to be near the spot after dark. They’d be in mortal fear of seeing old Congleton’s ghost. "I was still a little puzzled. What need was there to mark the place of the lantern so exactly. Anywhere near the window the light would be seen clearly enough out at sea. But now that I had moved the table I noticed four red marks on the floor. ’Here’s another discovery,’ I thought; ’there’s a mark for each leg of the table.’ I slewed it around again, so that the legs stood on the marks. Then it flashed on me; if the table was always in the same place, and the lantern always exactly on the marks, the light would always hit the same point out at sea. ’A very pretty scheme!’ says I to myself. ’Good master smugglers have all their wits about ’em.’ "It was clear as daylight now that the Folly was a signal-station, and sometimes, as the kegs showed, a storehouse as well. Of course they used old Congleton’s machinery for hoisting the kegs. That coil of rope, now! I pulled it over, and there, just underneath, was a pulley—an iron bar fitted with a small grooved wheel, and resting at each end on a wooden block; little grooves had been chiseled out to keep the bar steady. And when I came to look at ’em I saw, as I might have expected, that they’d been oiled not long before. "By this time I’d found out all I wished to know. The only thing left to be discovered was, who used the Folly? I made up my mind to get Lieutenant Blake to let me bring some men to the place one night when we saw the light, and catch the men in the act. But before I went away I thought I’d go down the staircase and see if there was anything there. I couldn’t find a door, yet the staircase must lead direct into the room; there was no other. I had another look at the cupboard, and found after some trouble that half the back of it was movable—it was a sliding panel. I pulled it aside; it moved quite easily; and I stepped through—carefully, I can tell you, for it was pitch dark.