Heath looked up.

“A member of the family? You said that once before.”

“Not necessarily. But some one who has been tainted by the perverted situation that grew out of old Tobias’s patriarchal ideas.”

“We might manage to put some one in the house to keep an eye on things,” suggested the Inspector. “Or, there’s a possibility of prevailing upon the members of the family to separate and move to other quarters.”

Vance shook his head slowly.

“A spy in the house would be useless. Isn’t every one there a spy now, watching all the others, and watching them with fear and suspicion? And as for dispersing the family: not only would you find old Mrs. Greene, who holds the purse-strings, an adamantine obstacle, but you’d meet all manner of legal complications as a result of Tobias’s will. No one gets a dollar, I understand, who doesn’t remain in the mansion until the worms have ravaged his carcass for a full quarter of a century. And even if you succeeded in scattering the remnants of the Greene line, and locked up the house, you wouldn’t have stamped out the killer. And there’ll be no end of this thing until a purifying stake has been driven through his heart.”

“Are you going in now for vampirism, Vance?” The case had exacerbated Markham’s nerves. “Shall we draw an enchanted ring around the house and hang garlic on the door?”

Markham’s extravagant comment of harassed discouragement seemed to express the hopeless state of mind of all of us, and there was a long silence. It was Heath who first came back to a practical consideration of the matter in hand.

“You spoke, Mr. Vance, about old man Greene’s will. And I’ve been thinking that, if we knew all the terms of that will, we might find something to help us. There’s millions in the estate, all of it left, I hear, to the old lady. What I’d like to know is, has she a full right to dispose of it any way she likes? And I’d also like to know what kind of a will the old lady herself has made. With all that money at stake, we might get on to a motive of some kind.”

“Quite—quite!” Vance looked at Heath with undisguised admiration. “That’s the most sensible suggestion that’s been made thus far. I salute you, Sergeant. Yes, old Tobias’s money may have some bearing on the case. Not a direct bearing, perhaps; but the influence of that money—the subterranean power it exerts—is undoubtedly tangled up in these crimes.—How about it, Markham? How does one go about finding out about other people’s wills?”