“In hiding somewhere. We shall get her all right. She can’t get money from her own bank—they’re warned. If Mrs. Forrest tries to get money for her, she will be followed. So if the worst comes to the worst, we can starve her out in time with any luck. But we’ve got another clue. There has been a most determined attempt to throw suspicion on an unfortunate relative of Miss Whittaker’s—a black Nonconformist parson, with the remarkable name of Hallelujah Dawson. He has certain pecuniary claims on Miss Whittaker—not legal claims, but claims which any decent and humane person should have respected. She didn’t respect them, and the poor old man might very well have been expected to nurse a grudge against her. Yesterday morning he tried to cash a Bearer cheque of hers for £10,000, with a lame-sounding story to the effect that it had arrived by the first post, without explanation, in an envelope. So, of course, he’s had to be detained as one of the kidnappers.”

“But that is very clumsy, surely. He’s almost certain to have an alibi.”

“I fancy the story will be that he hired some gangsters to do the job for him. He belongs to a Mission in Stepney—where that mauve cap came from—and no doubt there are plenty of tough lads in his neighbourhood. Of course we shall make close inquiries and publish details broadcast in all the papers.”

“And then?”

“Well then, I fancy, the idea is that Miss Whittaker will turn up somewhere in an agitated condition with a story of assault and holding to ransom made to fit the case. If Cousin Hallelujah has not produced a satisfactory alibi, we shall learn that he was on the spot directing the murderers. If he has definitely shown that he wasn’t there, his name will have been mentioned, or he will have turned up at some time which the poor dear girl couldn’t exactly ascertain, in some dreadful den to which she was taken in a place which she won’t be able to identify.”

“What a devilish plot.”

“Yes. Miss Whittaker is a charming young woman. If there’s anything she’d stop at, I don’t know what it is. And the amiable Mrs. Forrest appears to be another of the same kidney. Of course, doctor, we’re taking you into our confidence. You understand that our catching Mary Whittaker depends on her believing that we’ve swallowed all these false clues of hers.”

“I’m not a talker,” said the doctor. “Gang you call it, and gang it is, as far as I’m concerned. And Miss Findlater was hit on the head and died of it. I only hope my colleague and the Chief Constable will be equally discreet. I warned them, naturally, after what you said last night.”

“It’s all very well,” said Wimsey, “but what positive evidence have we, after all, against this woman? A clever defending counsel would tear the whole thing to rags. The only thing we can absolutely prove her to have done is the burgling that house on Hampstead Heath and stealing the coal. The other deaths were returned natural deaths at the inquest. And as for Miss Findlater—even if we show it to be chloroform—well, chloroform isn’t difficult stuff to get hold of—it’s not arsenic or cyanide. And even if there were finger-prints on the spanner—”

“There were not,” said Parker, gloomily. “This girl knows what she’s about.”