At Brett's request, detectives were hunting through Paris all that night and the next day for a sign of Hussein-ul-Mulk and his Turkish friends. But these gentlemen had vanished as completely as if the earth had swallowed them up. This was a strange thing. Although Paris is a cosmopolitan city, a party of Turks, only one of whom could speak French, should be discovered with tolerable rapidity in view of the fact that the French police maintain such a watch upon the inhabitants. It was not until Brett and his four companions quitted the train at Marseilles late at night and the barrister received a telegram from the commissary announcing that the search made by the police had yielded no results, that he suddenly recalled the existence of a doorless and windowless room in the Café Noir. Curiously enough, he had omitted to make any mention of this strange apartment in his recital to the official. He would not trust to the discretion of the Telegraph Department, so on reaching the Hotel du Louvre et de la Paix he succeeded, after some difficulty, in ringing up the commissary on the long-distance telephone. Having acquainted the police officer with the exact position of the hidden apartment, he ended by saying-- "Continue inquiries throughout Paris during the whole of to-morrow. Do not visit the Cabaret Noir for the purpose of police inspection until a late hour--long after midnight--when the café is empty and the Boulevard comparatively deserted. It is only a mere guess on my part. The Turks may not be there. If they are, they should be set at liberty and not questioned. Tell them they owe their escape to me. If you do not find them you may make other discoveries of general interest to the police. But above all things, I do not wish you to interfere with Gros Jean or his house until the next twenty-four hours have elapsed." The commissary assured him that his desires would be respected, and soon afterwards Brett went upstairs with the full determination to secure a long and uninterrupted night's sleep, of which he stood much in need. He had reached the sitting-room reserved for the use of the party when Talbot and Lord Fairholme burst in excitedly. "We have seen her!" gasped the earl. "Seen whom?" demanded the barrister. "Mademoiselle Beaucaire," cried Talbot; "the woman who accompanied Dubois in his flight from London. I recognized her instantly. I could pick her out among a million as the same person who so coolly made up Dubois to represent me, whilst I was lying tied on the bed in that flat." In their eagerness the two men had forgotten to close the door. Brett ran to it, and looked out into the passage to learn if their words had perchance been overheard. No one was in sight. He closed the door behind him when he re-entered the room, and said quietly-- "How did you happen to meet her?"