“Another way out would be for you to assume that I am not a liar; or that if I am one, at least I am incapable of such squalid trickery as the invention of this rigmarole in order to earn a fee by preventing you from marrying a man who has your affection and is worthy of it. If you make either of those assumptions, it follows that Mr Rony is a blackguard, and since you are plainly not a fool you will have done with him. But-” “You said you could prove it!” Wolfe nodded. “So I can. If my vanity won't let me scuttle, and if you reject both those assumptions, that's what I'll have to do. Now you see why I gave you so full a sketch of X. It will be impossible to brand Mr Rony without bringing X in, and even if that were feasible X would get in anyway. Proof of that already exists, on the roof of my house. You may come with me and take a look at it-by the way, I failed to mention another possibility.” Wolfe looked at our client. “You, sir, could of course pay me my bill to date and discharge me. In that event I presume your daughter would consider my indictment of Mr Rony as unproven as yours, and she would proceed-to do what? I can't say; you know her better than I do. Do you want to send me home?” Sperling was slumped in his chair, his elbow resting on its arm and his chin propped on his knuckles, with his gaze now on Gwenn and now on Wolfe. “Not now,” he said quietly. “Only-a question-how much of that was straight fact?” “Every word.” “What is X's name?” “That will have to wait. If we are forced into this, and you still want me to work for you, you will of course have to have it.” “All right, go ahead.” Wolfe went back to Gwenn. “One difficulty in an attempt to expose X, which is what this would amount to, will be the impossibility of knowing when we are rubbing against him. I am acquainted, more or less, with some three thousand people living or working in New York, and there aren't more than ten of them of whom I could say with certainty that they are in no way involved in X's activities. None may be; any may be. If that sounds extreme, Miss Sperling, remember that he has been devising and spreading his nets all your lifetime, and that his talents are great.