“Gentlemen,” and Mr. Cawthorne now turned sharply to face the others, “this is the Koh-i-noor!  Mr. Czenki didn’t mention it, but I was one of the three experts who had opportunity to examine the Koh-i-noor.  This is the Koh-i-noor!”

Startled, questioning eyes were turned upon Mr. Wynne; he was smiling.  There was a question in his face as he regarded Mr. Czenki.

“It is either the Koh-i-noor or an exact duplicate,” said Mr. Czenki.

“It is the Koh-i-noor,” repeated Mr. Cawthorne doggedly.

“Id seems to me,” interposed Mr. Schultze, “dat if der Koh-i-noor vas missing somebody would haf heard, ain’d id?  I haf nod heard.  Mr. Czenki made a misdake der oder day—­maybe you make id to-day?”

“You have made a mistake, I assure you, Mr. Cawthorne,” remarked Mr. Wynne quietly.  “You identify that as the Koh-i-noor, of course, by a slight inaccuracy in one of the facets adjoining the collet.  That inaccuracy is known to every diamond expert—­the mistake you make is a compliment to that as a replica.”

He resumed his position at the end of the table, and Mr. Schultze sat beside him.  Amazement was a thing of the past, as far as he was concerned.  Mr. Czenki dropped into his chair again.

“And now, Mr. Czenki, speaking as an expert, what would you say was the most perfect diamond the world?” asked Mr. Wynne.

“The five blue-white stones you mailed to these gentlemen,” replied the expert without hesitation.

“Perhaps I should have specified the most perfect diamond known to the world at large,” Mr. Wynne added smilingly.

“The Regent.”

Again Mr. Cawthorne looked around, with bewilderment in his eyes.  The others nodded their approval of Mr. Czenki’s opinion.

“The Regent, yes,” Mr. Wynne agreed; “one hundred and thirty-six and three-quarter carats, cut as a brilliant, worn by Napoleon in his sword-hilt, now in the Louvre at Paris, the property of the French Government—­valued at two and a half million dollars.”  His hand disappeared into the leather packet again; poised on his finger-tips, when he withdrew them, was another huge jewel.  He dropped it into Mr. Schultze’s hand.  “There is further proof that the diamond output has increased fiftyfold.”

Mr. Schultze seemed dazed as he turned and twisted the diamond in his hand.  After a moment he passed it on down the table without a word.

“A duplicate also,” and Mr. Wynne glanced at Mr. Cawthorne.  “It is reasonably certain that you would have heard of that if it had disappeared from the Louvre.”  He turned to Mr. Schultze again.  “I may add that this fiftyfold increase in output is not confined to small stones,” he went on tauntingly.  “They are of all sizes and values.  For instance?”

He lifted still another jewel from the packet and held it aloft for an instant.

“The Orloff!” gasped Mr. Solomon.