“I suppose you know what you were both talking about,” said Dr. Curtis, “but I’m damned if I did.”

“What’s your opinion of her, Curtis? No sign of epilepsy, was there?”

“None that I could see. Plain hysteria. That doesn’t say there’s nothing wrong mentally, of course.”

“No. What about it? Think she’s ga-ga?”

“Ah,” said Dr. Curtis, “you’re wondering if she’s the answer to the detective’s prayer for a nice homicidal lunatic.”

“Well,” said Alleyn, “what about it? Is she?”

Dr. Curtis pulled down his upper lip. “Well, my dear chap, you know how tricky it is. She seemed to speak very wildly, of course, although I must say you appeared to take an intelligent hand in the conversation.”

“What was she getting at, Mr. Alleyn?” asked Fox. “All that stuff about having a powerful protector and it seemed to be one of the twins. You don’t seriously suggest anybody impersonated one of those young fellows?”

“I don’t, Fox, but she does.”

“Then she must be dotty. What was the big idea, anyway?”

“It’s so damned preposterous that I hardly dare to think I’m on the right track. However, I’ll tell you what I imagine was the burden of her song.”

Dr. Kantripp returned. “The nurse and the maid are getting her to bed,” he said. “The maid will come along as soon as she can.”

“Right. Sit down, Dr. Kantripp, and tell us what you know of this lady’s history.”

“Very little,” said Dr. Kantripp instantly. “I never saw her until to-night. As far as I can gather from Lady Charles and the others, there’s a history of eccentricity. You’d better ask them about that.”

“Yes, of course,” agreed Alleyn with his air of polite apology, “but I thought that first of all I would just ask you. I suppose they didn’t happen to mention whether the lady was interested in black magic.”

“Now, how the devil,” asked Dr. Kantripp, “did you get hold of that?”

“I was just going to explain. You heard her saying something about Marguerite Luondman of Gebweiler and Anna Ruffs of Douzy?”

“I’ve got them down in these notes,” said Fox, “though I didn’t know how to spell them.”

“Well, unless my extremely unreliable memory is letting me down, those two were a brace of medieval witches.”

“Oh, lor’,” said Fox disgustedly.

“Go on,” said Curtis.

“Taking them in conjunction with her suggestions that she had a powerful protector, that her husband had been punished, that she had warned him of his peril, that she recognized her lift conductor by a mark on his neck, that this was a sign from her Little Master, together with all the rest of her mumbo jumbo, I came to the preposterous conclusion that Lady Wutherwood thinks her husband was destroyed by a demon.”

“Oh no, really!” cried Dr. Curtis. “It’s a little too much.”

“Have you ever come across a book called Compendium Maleficorum?”

“I have not. Why?”

“I don’t mind betting Lady Wutherwood’s got a copy.”