In their interest in the wealth of strange and curious ornaments displayed in the shop they did not notice that the Chinaman’s wrist was bound tightly under his flowing sleeve.

Elaine explained what it was she wanted, and with Kennedy’s aid selected a number of Chinese hangings and decorations.  They were about to leave the shop when Elaine’s eye was attracted by a little show case in which were many quaint and valuable Chinese ornaments in gold and silver and covered ivory.

“What an odd looking thing,” she said, pointing out a nobbed ring which reposed on the black velvet of the case.

“Quite odd,” agreed Kennedy.

The subtle Chinaman stood by the pile of hangings on the counter which Elaine had bought, overjoyed at such a large sale.  Praising the ring to Elaine, he turned insinuatingly to Kennedy.  There was nothing else for Craig to do—­he bought the ring, and the Chinaman proved again his ability as a merchant.

From the curio shop where Elaine had completed her purchases they drove to Kennedy’s laboratory.

I had been at work on a story for the Star when they entered.

“You will be there, too, Mr. Jameson?” coaxed Elaine, as she told of their morning’s work.

I needed no urging.

We were in the midst of planning the entertainment when a slight cough behind me made me start and turn quickly.

There stood Long Sin, the astute Chinaman who had delivered the bomb to Kennedy and had betrayed Bennett.  We had seen very little of him since then.

Long Sin bowed low and shuffled over closer to Kennedy.  I noticed that Elaine eyed Long Sin sharply.  But as yet we had seen no reason to suspect him, so cleverly had he covered his tracks.  Kennedy, having used him once to capture Bennett, was still not unwilling to use him in attempting to discover where Bennett’s hidden millions lay.

“I am in great trouble, Professor Kennedy,” began Long Sin in a low tone.  “You don’t know the Chinese of the city, but if you did you would know what blackmailers there are among them.  I have refused to pay blackmail to the Chong Wah Tong, and since then it has been trouble, trouble, trouble.”

Kennedy looked up quickly at the name Chong Wah Tong, thinking of the investigation which the Coroner had asked him to make into the murder.  He and Long Sin moved a few steps away, discussing the affair.

Elaine and I were still talking over the entertainment.

She happened to place her hand on the desk near Long Sin.  My back was toward him and I did not see him start suddenly and look at her hand.  On it was the ring—­the ring which, unknown to us, Long Sin had found in the passageway under Aunt Tabby’s garden, of which he had been robbed, and which now, by a strange chance, had come into Elaine’s possession.

It was a peculiar situation for Long Sin, although as yet we did not know it.  He could not lay claim to the mystic ring, for then Kennedy would make him prove his ownership, and the whole affair of which we still knew nothing would be exposed.