“Nor have I any desire to do you an injury, Dr. Sterndale. Surely the clearest proof of it is that, knowing what I know, I have sent for you and not for the police.”

Sterndale sat down with a gasp, overawed for, perhaps, the first time in his adventurous life. There was a calm assurance of power in Holmes’s manner which could not be withstood. Our visitor stammered for a moment, his great hands opening and shutting in his agitation.

“What do you mean?” he asked at last. “If this is bluff upon your part, Mr. Holmes, you have chosen a bad man for your experiment. Let us have no more beating about the bush. What do you mean?”

“I will tell you,” said Holmes, “and the reason why I tell you is that I hope frankness may beget frankness. What my next step may be will depend entirely upon the nature of your own defence.”

“My defence?”

“Yes, sir.”

“My defence against what?”

“Against the charge of killing Mortimer Tregennis.”

Sterndale mopped his forehead with his handkerchief. “Upon my word, you are getting on,” said he. “Do all your successes depend upon this prodigious power of bluff?”

“The bluff,” said Holmes sternly, “is upon your side, Dr. Leon Sterndale, and not upon mine. As a proof I will tell you some of the facts upon which my conclusions are based. Of your return from Plymouth, allowing much of your property to go on to Africa, I will say nothing save that it first informed me that you were one of the factors which had to be taken into account in reconstructing this drama—”