One thing was certain: suspicion would fall upon Don Silvio. Leon would probably lay the case before the queen regent, and Don Silvio might not impossibly be arrested on the charge of being concerned in his disappearance. He could not help believing that this man was at the bottom of it, for, think how he would, no other reason for his seizure presented itself. Ostensibly he had been imprisoned in order that his connection with Mercedes might be broken off, in which case she might enter a convent, to the great advantage of its revenues. But the knowledge that there was an engagement between them was at present confined to Leon and his sisters, for it had been agreed that it would be much better to keep it quiet until the time approached for their marriage, as Leon felt that the Church would use every effort to prevent this from taking place.

Mercedes might indeed have spoken of it in confession, but it was far more likely that Count Silvio, whose jealousy had been clearly aroused, and who hated him for the result of the duel, had set the Church authorities to work. It was not probable that the prior of the monastery had acted on his own responsibility. It was not a monastery that would benefit by Mercedes' fortune, and mere zeal would scarcely have prompted the prior to take so strong a step as to have him carried off; doubtless, therefore, he was acting under superior authority. Although the Inquisition had died out, and heretics could no longer be tortured or brought to the stake, the Roman Church in Spain was still almost as bigoted as in the olden days, and would assuredly not hesitate to take steps to prevent what would be considered as the backsliding of one of its faith. Knowing the enormous influence the priests still exercised, the measure that had been taken with reference to himself scarcely seemed extraordinary to Arthur, and he resented it rather because he believed that Don Silvio was at the bottom of it than on account of the outrage against himself.

After a rest of thirty-six hours, Arthur set to work as soon as he had eaten his supper. The lamp contained enough oil to burn all night, and it was only by its light that he was able to work. Lying on his stomach in the hole he gradually drove the tunnel forward, being obliged frequently to come out with the earth and rubble as he dug it down. When he had got two feet beyond the wall he turned on his back and, placing the lamp on his chest, began to bring down the earth above him. Luckily the mould was firm and tightly packed, for while there was thus no fear of sudden falls the walls stood upright and the earth dug out like putty. He had not the trouble of taking it out; as it fell he merely pushed it back into the open trench.

By morning he could stand upright to his work. As the bottom of the hole was two feet below the floor he was now some four feet above it. The labour had been very great, and although he had worked stripped to the waist he had suffered much from the heat. He rubbed himself with his blanket, as he had done ever since he began the work, for had he washed the appearance of the water would at once have aroused suspicions that he was engaged upon work of this kind. He dressed again, and was ready to receive his breakfast, and after eating this he went soundly to sleep. He could scarce rouse himself sufficiently to get up and take in his dinner when it came, and putting the tray down he at once went off to sleep again. At five o'clock he woke and ate his dinner, and when his supper arrived he put that by till midnight.

He now set to work with renewed vigour, for if all went well he should be free by morning. He put two of the paving-stones against the sides of his shaft, and, standing upon these, was able to bring down the earth rapidly. When he had dug two feet higher he trod the earth that had fallen firmly down, and placing the stones on these, again mounted on them. By twelve o'clock he could no longer reach overhead, and, measuring from the level of the floor of the cell, found that the cavity was now seven feet above it. He now pulled out the paving-stones, and set to work to dig some holes on each side of the shaft, in which he could place his feet. Having gained another foot by this means he went out, ate his supper, and dressed himself.

He was certain now that he should be out before daybreak. Again he set to work. The earth came down fast under the strokes of his knife. At last, at about four o'clock in the morning, the blade struck against a stone. This he felt was round, and differed altogether from those he had met with embedded in the earth. Gradually he cleared the space beneath it, and then found that a layer of stones closely packed together formed the ceiling of his shaft. He worked with renewed energy until the whole of the earth beneath was cleared away, then he dug two more foot-holes two feet higher than those he had last rested on. Taking his place in these, he pushed with all his force with both hands. The stones gave way at once, and his hands were in the air. In another minute the rest were cleared off, and, putting his hands on the edge of the hole, he hauled himself up and was a free man.

In the joy of his heart he set off to run, but presently steadied down into a walk. It was a quarter of an hour before he came upon a church familiar to him, and he was then able to direct his course to his lodgings. He had a key of the outer door, and, opening this, he felt his way up the stairs until he reached his door. Another key gave him admittance here. Opening the door of the sitting-room, he felt his way to the mantel. Here were always placed a flint and steel and a bundle of slips of rag dipped in sulphur, for although phosphorus matches were rapidly making their way in England, they were as yet unknown in Madrid. At the first blow of the flint against the steel he heard a movement in the next room, and as the sparks flew on to the tinder by the stroke, he heard Roper exclaim "Who is that?" as he jumped out of bed.

"It is I, Roper!"

There was a perfect shout of joy, and then he heard the honest fellow burst into a fit of hysterical sobbing. A moment later the sulphur ignited the tinder, and he lighted a candle. The door of Roper's bedroom was open, and Arthur saw that he had sunk back on to his bed again with his hands before his face. He went in to him and put his hand upon his shoulder.

"Roper, old friend," he said, "compose yourself. Thank God, I am back again safe and sound!"