The nobleman was at work upon the masonry of his dungeon,—his efforts being directed to remove the stones from the immediate vicinity of a small square aperture, or sink in the corner of the cell.

His implements were a knife and fork, and one of the screws of the frame-work of his bed.

But with these he worked arduously.

Nor was this the first day of his labours. No! for twenty-six days had he been toiling—toiling—toiling on, to make an opening into what he believed to be the common sewer,—even at the risk of inundating his dungeon, and thus perishing miserably!

But all those toils, and all that risk, were sustained and encountered for thee, Tom Rain!

Slowly—slowly—slowly had the work progressed; but now—on the twenty-eighth day—Arthur found himself so far advanced that escape from the dungeon was at least open to him.

But escape into what region?

Into those drains and sewers which run beneath the streets of London, and form a maze to which the only clue is a knowledge of the point whence he, who enters the labyrinth, originally starts! And this clue was not possessed by Arthur; for in what part of London his dungeon was situate, he had not the least idea. It could hardly be said that he was confident of this dungeon being in the metropolis at all;—and yet he had many reasons to believe that it was. For, in the first place, his gaoler had mentioned the fact of his letters having been sent by the twopenny post; secondly, he had ascertained that his cell was situate in the very vicinity of a common sewer, and sewers were not at that time formed in the villages surrounding the metropolis; and thirdly, he could scarcely believe that those who had arrested him in London, would have run the risk of removing him out of its precincts—for he was well aware that atrocious outrages and diabolical crimes may be perpetrated with greater chances of impunity in the metropolis than elsewhere.

But, although he was thus tolerably well convinced that his prison-house was within the boundaries of London, he had not the least notion of the precise locality. And when he had removed sufficient of the massive masonry to form an aperture large enough to permit a full-grown man to pass into the sewer,—and when he heard the muddy, slimy waters gurgling languidly in the depths below, he shuddered, and his blood ran cold—for he thought within himself, "I have heard of men who venture into these places in search of treasures, and who, having wandered for miles and miles beneath the streets of London, have issued safely forth again. But they knew whence they started; and thus that starting-post was a clue to guide them in the maze. But I know not whether, on entering that slimy shallow, I should turn to the right or to the left,—nor which channels to pursue in that terrible labyrinth!"

Then, ashamed of his fears—reproaching himself for his hesitation, he drank a deep draught of the wine that had been supplied him in the morning; and holding the lamp in one hand, and in the other a stout stick cut from one of the cross-beams that supported the mattress of his bed, he entered the common sewer.