"At least I have tried to."
"Good. You could keep up an intelligent conversation on the subject?"
"I believe I could."
"Then hand me that little box from the mantel-piece."
He opened the lid and took out a small object most carefully wrapped in some fine Eastern silk. This he unfolded, and disclosed a delicate little saucer of the most beautiful deep-blue colour.
"It needs careful handling, Watson. This is the real egg-shell pottery of the Ming dynasty. No finer piece ever passed through Christie's. A complete set of this would be worth a king's ransom—in fact, it is doubtful if there is a complete set outside the Imperial palace of Peking. The sight of this would drive a real connoisseur wild."
"What am I to do with it?"
Holmes handed me a card upon which was printed: "Dr. Hill Barton, 369 Half Moon Street."
"That is your name for the evening, Watson. You will call upon Baron Gruner. I know something of his habits, and at half-past eight he would probably be disengaged. A note will tell him in advance that you are about to call, and you will say that you are bringing him a specimen of an absolutely unique set of Ming china. You may as well be a medical man, since that is a part which you can play without duplicity. You are a collector, this set has come your way, you have heard of the Baron's interest in the subject, and you are not averse to selling at a price."
"What price?"