"Terrible danger!" Harold said gravely. "But I have got to the bottom of the mystery now, and the same thing is not likely to happen again. I can't tell you now; in fact, if I did there would be no luncheon-party at the Belgrave to-day. But your curiosity will not be unduly tried."

By the use of the telephone and a cab, Harold managed to carry out Mrs. Benstein's desires. Parkford was waiting in his chambers, having just breakfasted.

"I expected you," he said. "Any news of the ruby?"

"Mrs. Benstein says it is all right," Harold replied. "She wants you to lunch with her at two at the Belgrave, and I was to ask you to put the cheque in your pocket. It sounds flighty and very unbusinesslike, but there are other matters mixed up with this one, and Mrs. Benstein is not the woman to do a thing of this kind without some very good reason. Will you come?"

"With pleasure," Parkford replied, "and bring the cheque along. Before very long an invitation from Mrs. Benstein will confer a mark of distinction."

The ruler of Koordstan was dressing as Denvers arrived, and suggesting something in the way of champagne and soda-water as a means of an appetite for breakfast. He had gone to bed painfully sober for him, and he resented the interference of Harold accordingly.

"'Pon my word, you seem to forget yourself," he said. "If a man can't do as he likes in my position——"

"It is precisely a man in your position who cannot do as he likes," Harold said coolly. "Leave that stuff alone till after lunch, when you can do as you please. If you want your stone back——"

"I had forgotten all about the confounded thing!" the Shan growled. "Let me see, what had you arranged? I was so interested in my bridge last night that I forgot all about it. Wasn't there a man called Parkford who promised to do something to get me out of my scrape?"

"He promised a cheque," Harold explained. "He is ready to redeem the stone for us, and Mrs. Benstein has promised that it shall be produced at the proper time. I have seen her already this morning, and she wants you to join her luncheon-party at the Belgrave at two."