“I should not like to say that it is impossible,” I replied. “The disease is practically unknown to me. I have never practised out of England and have had no occasion to study it. Until I have looked the subject up, I should not be in a position to give an opinion. Of course, if I could see Mr. Graves in one of what we may call his ‘lucid intervals’ I should be able to form a better idea. Do you think that could be managed?”

“It might. I see the importance of it and will certainly do my best; but he is a difficult man; a very difficult man. I sincerely hope it is not sleeping sickness.”

“Why?”

“Because⁠—as I understood from him⁠—that disease is invariably fatal, sooner or later. There seem to be no cure. Do you think you will be able to decide when you see him again?”