“Look here, inspector,” he said angrily, “you seem to be suffering from an _idée fixe_ about Mrs. Fleetwood. First of all you insist that she murdered Staveley. Now you want to make out that she shot Cargill; and you know perfectly well the thing's absurd. You haven't got a shred of evidence to make your ideas hang together in this last affair—not a shred.” “I'm not talking about evidence just now, Mr. Wendover. There's been no time to collect any as yet. I'm just taking a look at possibilities; and this is quite within the bounds of possibility, as you'll see. Suppose Mrs. Fleetwood came out of Lynden Sands village and drove up the road towards Flatt's cottage. She could see the door of it as she came up the hill to the corner. You'll not deny that, I suppose?” “No,” Wendover admitted contemptuously. “That's quite possible.” “Then suppose, further,” the inspector went on, “that just before she reached the corner the door of Flatt's cottage opened and a man came out. In the light from the open door he'd be fairly plain to anyone in her position—but not too plain.” “What's that got to do with it?” Wendover demanded brusquely. “Haven't you Cargill's own evidence that he knows nobody hereabouts except Derek Fordingbridge? Why should Mrs. Fleetwood want to shoot a total stranger? You're not suggesting that she's a homicidal maniac, are you?” “No,” Armadale retorted, “I'm suggesting that she mistook Cargill's figure for somebody else—somebody whom she'd a good reason for putting out of the way. She'd only get a glimpse of him as he opened and shut the cottage door. A mistake's quite on the cards. Is that impossible, so far?” “No, but I shouldn't say that it mattered a rap, if you ask me.” “That's as it may be,” the inspector returned, obviously nettled by Wendover's cavalier manner. “What happens after that? She shuts off her lights; gets down off the car; follows Cargill along the road, still mistaking him for someone else. She steals up behind him and tries to shoot him, but makes a muddle of it owing to the bad light. Then Cargill shouts for help, and she recognises that she's made a mistake. Off she goes, back to her car; switches on her lights and sounds her horn; and then pretends to have been coming up the hill in the normal way and to have arrived there by pure accident at that time. Is that impossible?” “Quite!” said Wendover bluntly. “Come now, squire,” Sir Clinton interposed, as the tempers of his two companions were obviously near the danger-point. “You can't say anything's impossible except a two-sided triangle and a few other things of that sort. What it really amounts to is that you and the inspector differ pleasantly as to the exact degree of probability one can attach to his hypothesis. He thinks it probable; you don't agree. It's a mere matter of the personal equation. Don't drag in the Absolute; it's out of fashion in these days.”