We had two servants whom we could utterly trust. There was a house where I could live. Under pledge of secrecy, Mr. Kent, who is a surgeon, was prepared to stay with me. It seemed simple enough on those lines. The alternative was a dreadful one—segregation for life among strangers with never a hope of release. But absolute secrecy was necessary, or even in this quiet countryside there would have been an outcry, and I should have been dragged to my horrible doom. Even you, Jimmie—even you had to be kept in the dark. Why my father has relented I cannot imagine.”

Colonel Emsworth pointed to me.

“This is the gentleman who forced my hand.” He unfolded the scrap of paper on which I had written the word “Leprosy.” “It seemed to me that if he knew so much as that it was safer that he should know all.”

“And so it was,” said I. “Who knows but good may come of it? I understand that only Mr. Kent has seen the patient. May I ask, sir, if you are an authority on such complaints, which are, I understand, tropical or semi-tropical in their nature?”

“I have the ordinary knowledge of the educated medical man,” he observed with some stiffness.

“I have no doubt, sir, that you are fully competent, but I am sure that you will agree that in such a case a second opinion is valuable. You have avoided this, I understand, for fear that pressure should be put upon you to segregate the patient.”

“That is so,” said Colonel Emsworth.

“I foresaw this situation,” I explained, “and I have brought with me a friend whose discretion may absolutely be trusted. I was able once to do him a professional service, and he is ready to advise as a friend rather than as a specialist. His name is Sir James Saunders.”

The prospect of an interview with Lord Roberts would not have excited greater wonder and pleasure in a raw subaltern than was now reflected upon the face of Mr. Kent.

“I shall indeed be proud,” he murmured.

“Then I will ask Sir James to step this way. He is at present in the carriage outside the door. Meanwhile, Colonel Emsworth, we may perhaps assemble in your study, where I could give the necessary explanations.”

And here it is that I miss my Watson. By cunning questions and ejaculations of wonder he could elevate my simple art, which is but systematized common sense, into a prodigy. When I tell my own story I have no such aid. And yet I will give my process of thought even as I gave it to my small audience, which included Godfrey's mother in the study of Colonel Emsworth.

“That process,” said I, “starts upon the supposition that when you have eliminated all which is impossible, then whatever remains, however improbable, must be the truth. It may well be that several explanations remain, in which case one tries test after test until one or other of them has a convincing amount of support. We will now apply this principle to the case in point. As it was first presented to me, there were three possible explanations of the seclusion or incarceration of this gentleman in an outhouse of his father's mansion. There was the explanation that he was in hiding for a crime, or that he was mad and that they wished to avoid an asylum, or that he had some disease which caused his segregation. I could think of no other adequate solutions. These, then, had to be sifted and balanced against each other.

“The criminal solution would not bear inspection. No unsolved crime had been reported from that district. I was sure of that. If it were some crime not yet discovered, then clearly it would be to the interest of the family to get rid of the delinquent and send him abroad rather than keep him concealed at home.