“I believe it, and I am going to put you to the test. I’ll tell you my idea. It has occurred to me that these people might be made to give themselves away. Suppose they had one of their private meetings to discuss the affairs of the syndicate, and that, unknown to them, witnesses could be present to overhear what was said. Would there not at least be a sporting chance that they would incriminate themselves?”

“Yes!” said Merriman, much interested. “Likely enough. But I don’t see how you could arrange that.”

Willis smiled slightly.

“I think it might be managed,” he answered. “If a meeting were to take place we could easily learn where it was to be held and hear what went on. But the first point is the difficulty—the question of the holding of the meeting. In the ordinary course there might be none for months. Therefore we must take steps to have one summoned. And that,” he turned to Madeleine, “is where I want your help.”

His hearers stared, mystified, and Willis resumed.

“Something must happen of such importance to the welfare of the syndicate that the leaders will decide that a full conference of the members is necessary. So far as I can see, you alone can cause that something to happen. I will tell you how. But I must warn you that I fear it will rake up painful memories.”

Madeleine, her lips parted, was hanging on his words.

“Go on,” she said quickly, “we have settled all that.”

“Thank you,” said Willis, taking a sheet of paper from his pocket. “I have here the draft of a letter which I want you to write to Captain Beamish. You can phrase it as you like; in fact I want it in your own words. Read it over and you will understand.”

The draft ran as follows: