"That is my affair," he replied. "You have lately been associating with several men and women who, though you may not know it, belong to a gang of exceedingly clever criminals. These people, while mixing in Society, prey upon it. Until last night I was myself a member of this gang; for a reason that I need not at present mention I have now disassociated myself from it for ever. To-day my late accomplices will discover that I have turned traitor, as they will term it, and at once they will set to work to encompass my death," he added. "I want you, Mr. Berrington, to save me from them." I stared at him in surprise. "But how can I do that, and why should I do it?" I said shortly. "I don't know who you are, and if you choose to aid and abet criminals you have only yourself to thank when they turn upon you." "Naturally," he answered, with what looked very like a sneer; "I don't ask you to do anything in return for nothing, Mr. Berrington. But if you will help in this crisis, I can, and will, help you. At this moment you are at a loss to know why, when you called at Willow Road an hour or so ago, the woman who opened the door assured you that you had come to the wrong house. You inquired first for Miss Challoner, then for Mrs. Stapleton, and then for Hugesson Gastrell—am I not right?" "Well, you are," I said, astonished at his knowledge. "I was in the hall when you called, and I heard you. Gastrell, Mrs. Stapleton, and Miss Challoner were also in the house. They are there now, but to-night they go to Paris—they will cross from Newhaven to Dieppe. It was to tell you they were going to Paris that I wished to speak to you now—at least that was one reason." "And what are the other reasons?" I asked, with an affectation of indifference that I was far from feeling. "I want money, Mr. Berrington, that is one other reason," the stranger said quickly. "You can afford to pay for information that is worth paying for. I know everything about you, perhaps more than you yourself know. If you pay me enough, I can probably protect myself against these people who until yesterday were my friends, but are now my enemies. And I can put you in possession of facts which will enable you, if you act circumspectly, presently to get the entire gang arrested." "At what time do the three people you have just named leave for Paris?" I asked, for the news that Connie Stapleton and Dulcie were going to France together had given me a shock. "To-night, at nine." "Look here," I exclaimed, turning upon him sharply, "tell me everything you know, and if it is worth paying for I'll pay."