The beautiful house and grounds indicated that Baron Gruner was, as Sir James had said, a man of considerable wealth. A long winding drive, with banks of rare shrubs on either side, opened out into a great gravelled square adorned with statues. The place had been built by a South African gold king in the days of the great boom, and the long, low house with the turrets at the corners, though an architectural nightmare, was imposing in its size and solidity. A butler, who would have adorned a bench of bishops, showed me in and handed me over to a plush-clad footman, who ushered me into the Baron’s presence.

He was standing at the open front of a great case which stood between the windows and which contained part of his Chinese collection. He turned as I entered with a small brown vase in his hand.

“Pray sit down, Doctor,” said he. “I was looking over my own treasures and wondering whether I could really afford to add to them. This little Tang specimen, which dates from the seventh century, would probably interest you. I am sure you never saw finer workmanship or a richer glaze. Have you the Ming saucer with you of which you spoke?”

I carefully unpacked it and handed it to him. He seated himself at his desk, pulled over the lamp, for it was growing dark, and set himself to examine it. As he did so the yellow light beat upon his own features, and I was able to study them at my ease.

He was certainly a remarkably handsome man. His European reputation for beauty was fully deserved. In figure he was not more than of middle size, but was built upon graceful and active lines. His face was swarthy, almost Oriental, with large, dark, languorous eyes which might easily hold an irresistible fascination for women. His hair and moustache were raven black, the latter short, pointed, and carefully waxed. His features were regular and pleasing, save only his straight, thin-lipped mouth. If ever I saw a murderer’s mouth it was there - a cruel, hard gash in the face, compressed, inexorable, and terrible. He was ill-advised to train his moustache away from it, for it was Nature’s danger-signal, set as a warning to his victims. His voice was engaging and his manners perfect. In age I should have put him at little over thirty, though his record afterwards showed that he was forty-two.

“Very fine - very fine indeed!” he said at last. “And you say you have a set of six to correspond. What puzzles me is that I should not have heard of such magnificent specimens. I only know of one in England to match this, and it is certainly not likely to be in the market. Would it be indiscreet if I were to ask you, Dr. Hill Barton, how you obtained this?”

“Does it really matter?” I asked with as careless an air as I could muster. “You can see that the piece is genuine, and, as to the value, I am content to take an expert’s valuation.”

“Very mysterious,” said he with a quick, suspicious flash of his dark eyes. “In dealing with objects of such value, one naturally wishes to know all about the transaction. That the piece is genuine is certain. I have no doubts at all about that. But suppose - I am bound to take every possibility into account - that it should prove afterwards that you had no right to sell?”

“I would guarantee you against any claim of the sort.”

“That, of course, would open up the question as to what your guarantee was worth.”

“My bankers would answer that.”

“Quite so. And yet the whole transaction strikes me as rather unusual.”

“You can do business or not,” said I with indifference. “I have given you the first offer as I understood that you were a connoisseur, but I shall have no difficulty in other quarters.”

“Who told you I was a connoisseur?”

“I was aware that you had written a book upon the subject.”