“I’ll ask one, right off, Mr. Keefe,” and Hallen spoke mildly but straightforwardly. “Can you give me any fact or suggest to me any theory that points toward any one but Mr. Daniel Wheeler as the murderer of Samuel Appleby?”

Curtis Keefe was dismayed. What could he reply to this very definite question? A negative answer implicated Wheeler at once—while a “yes,” would necessitate the disclosure of another suspect. And Keefe was not blind to the fact that Hallen’s eyes had strayed more than once toward Maida Wheeler with a curious glance.

Quickly making up his mind, Keefe returned: “No fact, but a theory based on my disbelief in Mr. Wheeler’s guilt, and implying the intrusion of some murderous-minded person.”

“Meaning some marauder?” Hallen looked disdainful.

“Some intruder,” Keefe said. “I don’t know who, or for what reason, but I don’t think it fair to accuse Mr. Wheeler without investigating every possible alternative.”

“There are several alternatives,” Burdon declared; “I may as well say right out, that I’ve no more definite suspicion of Mr. Wheeler than I have of Mrs. Wheeler or Miss Wheeler.”

“What!” and Jeffrey Allen looked almost murderous himself.

“Don’t get excited, sir. It’s my business to suspect. Suspicion is not accusation. You must admit all three of the Wheeler family had a motive. That is, they would, one and all, have been glad to be released from the thrall in which Mr. Appleby held them. And no one else present had a motive! I might suspect you, Mr. Allen, but that you were at the fire at the time, according to the direct testimony of Mr. Keefe.”

“Oh, yes, we were at the fire, all right,” Allen agreed, “and I’d knock you down for saying to me what you did, only you are justified. I would far rather be suspected of the murder of Mr. Appleby than to have any of the Wheelers suspected. But owing to Keefe’s being an eye-witness of me at the time, I can’t falsify about it. However, you may set it right down that none of the three Wheelers did do it, and I’ll prove it!”

“Go to it, Allen,” Keefe cried. “I’ll help.”