The man who walked alone along the shore was too deeply engrossed in thought to take much note of his surroundings, although more than once he turned his eyes towards the darkness of the cave. A belt of rocks stretched between, covered with slimy, green seaweed. It was evident that he had no intention of crossing this to explore the mysteries beyond. Just out of reach of the sea he moved, his hands behind him and his head bent.

All through the day he had been pent in a stuffy courtroom, closely following the evidence that, like a net of strong weaving, was gradually closing around the prisoner Guillaume Rodolphe. All France was seething over the trial. All Europe watched with vivid interest.

Another man's name had begun to be uttered on all sides, in court and out of it, coupled continuously with the name of the man who was standing his trial. Bertrand de Montville, where was he? All France would soon be waiting to do him justice, to pay him high honour, to compensate him for the indignities he had wrongfully suffered. He would have to face another court-martial, it was true; but the outcome of that would be a foregone conclusion, and his acquittal would raise him to a pinnacle of popularity to which he had surely never aspired, even in the days when ambition had been the ruling passion of his life.

Undoubtedly he would be the hero of the hour, if he could be found. But where was he? Everyone was asking the question. None knew the answer. Some said he was in England, awaiting the turn of events, abiding his opportunity; others that he was already in France, lying hidden in Paris, or even risking arrest at Valpré itself. The police were uniformly reticent upon the subject, but it was generally believed that there would be small difficulty in finding him when the moment arrived. Some went so far as to assert that he had actually been arrested, and was being kept a close prisoner by the authorities, who were plainly in fear of serious rioting. Whatever the truth of the matter, the fact remained that the tide of public opinion had set very strongly in his favour, and was likely to wax to a tumultuous enthusiasm exceedingly difficult to cope with when the object thereof should present himself.

With all of this Trevor Mordaunt was well acquainted; but he, on his part, was firmly convinced that Bertrand would keep away until he himself had left France. To come to Valpré now would be to court a meeting with him, and this, he was convinced, Bertrand would do his utmost to avoid. The break between them had been quite final. Moreover, he probably believed that Chris was at Valpré also, and he had apparently determined not to see her again. But here an evil thought forced its way. Might they not, quite possibly, be in communication with one another? It had presented itself many times before, that thought, and he had sought to put it from him. But to-night it would not be denied. It conquered and possessed him. Was it at all likely that the parting between them had been final?

Only that afternoon evidence had been given of the episode that had led to the duel on the Valpré sands more than four years before. He had listened with a set face to the account of the insult and the subsequent challenge, and though no name had been mentioned, he had known and faced the fact that the woman in the case had been his wife. Even then, Bertrand had regarded her as his peculiar charge, as under his exclusive protection. And she—had she not told him with burning unrestraint that she had always loved this man, would love him till she died?

With the gesture of one who relinquishes his hold upon something he has discovered to be valueless, Trevor Mordaunt turned in his tracks and began to walk back over the long stretch of sand. He looked no longer in the direction of the Magic Cave, but rather quickened his steps as though he desired to leave it far behind. But there was no escaping that all-mastering suspicion. It went with him, closely locked with his own spirit, and he could not shake it off.

Back to his hotel he walked, with no glance at sea or shining sunset, and went straight to his own room. There was a private sitting-room adjoining, which he was wont to share with some of his fellow-journalists. They used it as a club writing-room when the proceedings of the court-martial were over for the day. He had his notes in his pocket; his report was not yet written. He remembered that he must catch the midnight mail, and decided that he would not stop to dress. That day's sitting had been longer than usual, and his walk along the shore had made him late.

He passed straight through his bedroom, therefore, and into the sitting-room that overlooked the sea. A small, round-backed man, with a shag of black hair upon his face, was sitting by the window. There were three other men in the room, all writing busily. All, save the man by the window, glanced up at Mordaunt's entrance and nodded to him. They were all English, with the exception of the stranger, who was obviously French.

Mordaunt looked at him questioningly, but no one volunteered an explanation. He had evidently been sitting there for some time. His gaze was fixed upon the darkening sea. It was plain that he had no desire to court attention.