“Why do you not write them yourself?” I said, with some bitterness.

“I will, my dear Watson, I will. At present I am, as you know, fairly busy, but I propose to devote my declining years to the composition of a textbook, which shall focus the whole art of detection into one volume. Our present research appears to be a case of murder.”

“You think this Sir Eustace is dead, then?”

“I should say so. Hopkins’s writing shows considerable agitation, and he is not an emotional man. Yes, I gather there has been violence, and that the body is left for our inspection. A mere suicide would not have caused him to send for me. As to the release of the lady, it would appear that she has been locked in her room during the tragedy. We are moving in high life, Watson, crackling paper, ‘ E. B. ’ monogram, coat-of-arms, picturesque address. I think that friend Hopkins will live up to his reputation, and that we shall have an interesting morning. The crime was committed before twelve last night.”