“Have you read the book?”

“No.”

“Dear me, this becomes more and more difficult for me to understand! You are a connoisseur and collector with a very valuable piece in your collection, and yet you have never troubled to consult the one book which would have told you of the real meaning and value of what you held. How do you explain that?”

“I am a very busy man. I am a doctor in practice.”

“That is no answer. If a man has a hobby he follows it up, whatever his other pursuits may be. You said in your note that you were a connoisseur.”

“So I am.”

“Might I ask you a few questions to test you? I am obliged to tell you, Doctor - if you are indeed a doctor - that the incident becomes more and more suspicious. I would ask you what do you know of the Emperor Shomu and how do you associate him with the Shoso-in near Nara? Dear me, does that puzzle you? Tell me a little about the Northern Wei dynasty and its place in the history of ceramics.”

I sprang from my chair in simulated anger.

“This is intolerable, sir,” said I. “I came here to do you a favour, and not to be examined as if I were a schoolboy. My knowledge on these subjects may be second only to your own, but I certainly shall not answer questions which have been put in so offensive a way.”

He looked at me steadily. The languor had gone from his eyes. They suddenly glared. There was a gleam of teeth from between those cruel lips.

“What is the game? You are here as a spy. You are an emissary of Holmes. This is a trick that you are playing upon me. The fellow is dying I hear, so he sends his tools to keep watch upon me. You’ve made your way in here without leave, and, by God! you may find it harder to get out than to get in.”

He had sprung to his feet, and I stepped back, bracing myself for an attack, for the man was beside himself with rage. He may have suspected me from the first; certainly this cross-examination had shown him the truth; but it was clear that I could not hope to deceive him. He dived his hand into a side-drawer and rummaged furiously. Then something struck upon his ear, for he stood listening intently.

“Ah!” he cried. “Ah!” and dashed into the room behind him.

Two steps took me to the open door, and my mind will ever carry a clear picture of the scene within. The window leading out to the garden was wide open. Beside it, looking like some terrible ghost, his head girt with bloody bandages, his face drawn and white, stood Sherlock Holmes. The next instant he was through the gap, and I heard the crash of his body among the laurel bushes outside. With a howl of rage the master of the house rushed after him to the open window.

And then! It was done in an instant, and yet I clearly saw it. An arm - a woman’s arm - shot out from among the leaves. At the same instant the Baron uttered a horrible cry - a yell which will always ring in my memory. He clapped his two hands to his face and rushed round the room, beating his head horribly against the walls. Then he fell upon the carpet, rolling and writhing, while scream after scream resounded through the house.

“Water! For God’s sake, water!” was his cry.

I seized a carafe from a side-table and rushed to his aid. At the same moment the butler and several footmen ran in from the hall. I remember that one of them fainted as I knelt by the injured man and turned that awful face to the light of the lamp. The vitriol was eating into it everywhere and dripping from the ears and the chin. One eye was already white and glazed. The other was red and inflamed. The features which I had admired a few minutes before were now like some beautiful painting over which the artist has passed a wet and foul sponge. They were blurred, discoloured, inhuman, terrible.