“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—”

“I came back—”

“I have heard your reasons and regard them as unconvincing and inadequate. We will pass that. You came down here to ask me whom I suspected. I refused to answer you. You then went to the vicarage, waited outside it for some time, and finally returned to your cottage.”

“How do you know that?”

“I followed you.”

“I saw no one.”

“That is what you may expect to see when I follow you. You spent a restless night at your cottage, and you formed certain plans, which in the early morning you proceeded to put into execution. Leaving your door just as day was breaking, you filled your pocket with some reddish gravel that was lying heaped beside your gate.”

Sterndale gave a violent start and looked at Holmes in amazement.