[CHAPTER XX.]

RESCUED.

A man standing on one of the lowermost stairs with a lantern lighted Burgo and Mr. Marchment on their way down.

Burgo now found himself on the ground-floor of the tower. He had been unconscious when brought there, and he looked about him with some measure of curiosity. There were a couple of doors facing each other, the larger and more substantial of which he rightly conjectured to be the one which gave admittance to the tower from the outside, and that the other led down to the underground passage. What, however, struck him most was a hole in the wall, where the masonry, which lay in a confused heap on the floor, had been knocked away, leaving a gaping chasm large enough for a man to pass through. But he had only just time to note these things before the sailor with the lantern led the way through the gap in the wall. As Marchment beckoned Burgo to follow him, he said laughingly: "You can see for yourself that I and my fellows were put to some little trouble before we could get at you. But you were such a puzzle to us--some of my men would have it the tower was haunted, and you the ghost--that we couldn't rest till we had found out all about you."

Burgo had vaguely expected that on stepping through the gap he should find himself in the open air, instead of which he was in a tiny chamber, just big enough to hold three men, built in the thickness of the wall, with a narrow flight of steps at his feet, apparently leading down into the foundations of the tower. But there was no time to wonder: down the steps they went in single file, slowly and carefully, coming before long to a larger chamber, measuring about twenty feet by twelve, hollowed out of the body of the cliff on which the tower was built. Burgo could now plainly hear the plash and beat of the tide, which sounded close at hand.

As before, however, there was only just time to glance around, for the man with the lantern was still leading the way. There was still another flight of steps to descend, much broader and of rougher construction than the first, with a massive grille, or open-work iron door, at the bottom of them, now wide open, and beyond that a cavern of some spaciousness open to the sea, with, a little lower than the grille, a sort of rude causeway formed of big, slippery sea-worn slabs, which reached nearly to the mouth of the cave, and was evidently washed over by every tide. Not far from the end of this landing-place, the tide being now on the turn, a boat was waiting with a couple of men in her. The one with the lantern held out his hand to Burgo to help him over the slippery footway, Marchment followed, and a couple of minutes later the boat was pushed off, and the oars unshipped. As they swept out of the cavern on the summit of a reflex wave, the light of the lantern was extinguished. The oars were muffled, and the men pulled almost without a sound. The night was dark and moonless, canopied with heavy clouds which would probably shed themselves in rain before many hours were over. Not a word above a whisper was spoken till they pulled up under the lee of the Naiad, which showed like some huge black monster of the deep, with not a single gleam of light anywhere visible.

"All well?" demanded a voice softly from out the darkness.

"All well!" responded a voice from the boat.

"Await my return," whispered Marchment to Burgo.

Then everybody left the boat save Burgo and one of the men. But barely five minutes had passed before Marchment was back, and one by one four men followed him. They began at once to give way, and, as nothing was said to them, they had doubtless had their orders beforehand. Marchment seated himself in the stern and took the tiller; but first he passed a revolver to Burgo, whispering as he did so: "One never knows what may happen, and it is just as well to be prepared for eventualities."