"Yes, I have heard that tale before. In fact, I have a metal ring which I was told would exactly encircle the two opals, if placed together to form an egg."
"How could you have such a thing?" asked Mr. Livingstone, with genuine surprise.
"The man who stole the jewels, so the story goes, wishing to enhance their value as much as possible, arranged this as a scheme by which the genuineness of the opals could be tested. He placed the opals together, as before they were cut, and had a silver band made which would exactly clasp them in that position. This band opens and shuts with a spring catch, like a bracelet, and as, when closed, it exactly fits the opals, holding the two firmly together, the owner of the band could easily tell whether the true opals were before him, or not. In some way the opals were next stolen without the band, and their whereabouts was unknown when a dealer in Naples told me the story of the silver band, which he offered to sell me. I scarcely credited his tale, but as all large jewels might in time be offered to me, I thought it well to purchase the band."
"Why, then, if you still have it, it would be interesting to make the test, would it not?"
"Yes, I think so. I will get the band."
Mr. Mitchel placed the two opals on the desk before him and went over to the safe, where he was occupied some time opening the combination lock. While he was thus busy a strange thing seemed to occur. At least it seemed strange to Mr. Barnes. He had marvelled to see Mr. Mitchel place the two opals within easy reach of Mr. Livingstone, and then deliberately turn his back while he opened the safe. But what seemed more mysterious was Mr. Livingstone's action. Mr. Mitchel had scarcely stooped before the safe when his guest leaned forward, with both arms outstretched simultaneously; his two hands grasped the opals, the hands then swiftly sought his vest pockets, after which he calmly puffed his cigar. Thus he seemed to have taken the opals from the table and to have placed them in his pockets. Yet how could he hope to explain their absence to Mr. Mitchel? This thought flashed through Mr. Barnes's mind as his eyes instinctively turned again to the desk, when, to his utter astonishment, he saw the opals exactly where Mr. Mitchel had placed them. Had the thought that he could not explain away the disappearance caused the man to change his mind at the very moment when he had impulsively clutched the treasures? Mr. Barnes was puzzled, and somewhat worried too, for he began to fear that more had happened, or was happening, than he comprehended.
"Here is the band," said Mr. Mitchel, returning to the desk, and resuming his seat. "Let us see how it fits the opals. First, let me ask you, are you confident that you are selling me one of the genuine Aztec opals?"
"I am. I have a history which makes its authenticity indubitable."
"Then we will try our little test. There; the band clamps the two perfectly. Look for yourself."
"Certainly; the test is complete. These are undoubtedly the Aztec opals. Mr. Mitchel, you are to be congratulated upon gaining possession of such unique gems."