"Make terms with him!" he muttered. "Case of have to, I reckon!" Levendale turned once more to the Japanese, who smiled on him. "Look you here, Mr. Yada," said Levendale, "I don't know who you are beyond what I'm told--your card tells me nothing except that you live--lodge, I suppose--in Gower Street. You've got mixed up in this, somehow, and you've got knowledge to dispose of. Now, I don't buy unless I know first what it is I'm buying. So--let's know what you've got to sell?" Yada swept the room with a glance. "Before these gentlemen?" he asked. "In open market, eh?" "They're all either police, or detectives, or concerned," retorted Levendale. "There's no secret. I repeat--what have you got to sell? Specify it!" Yada lifted his hands and began to check off points on the tips of his fingers. "Three items, then, Mr. Levendale," he replied cheerfully. "First--the knowledge of who has got the diamond and the money. Second--the knowledge of where he is at this moment, and will be for some hours. Third--the knowledge of how you can successfully take him and recover your property. Three good, saleable items, I think--yes?" Purdie watched carefully for some sign of greed or avarice in the informer's wily countenance. To his surprise, he saw none. Instead, Yada assumed an almost sanctimonious air. He seemed to consider matters--though his answer was speedy. "I don't want to profit--unduly--by this affair," he said. "At the same time, from all I've heard, I'm rendering you and your friend a very important service, and I think it only fair that I should be remunerated. Give me something towards the expenses of my medical education, Mr. Levendale: give me five hundred pounds." With the briefest exchange of glances with Stephen Purvis, Levendale pulled out a cheque-book, dashed off a cash cheque, and handed it over to the Japanese, who slipped it into his waistcoat pocket. "Now--your information!" said Levendale. "To be sure," replied Yada. "Very well. Chang Li has the diamond and the money. And he is at this moment where he has been for some days, in hiding. He is in a secret room at a place called Pilmansey's Tea Rooms, in Tottenham Court Road--a place much frequented by medical students from our college. The fact of the case is, Mr. Policeman, and the rest of you generally, there is a secret opium den at Pilmansey's, though nobody knows of it but a few frequenters. And there!--there you will find Chang Li." "You've seen him there?" demanded Levendale. "I saw him there during last night--I know him to be there--he will be there, either until you take him, or until his arrangements are made for getting out of this country," answered Yada. Levendale jumped up, as if for instant action. But the Inspector quietly tapped him on the elbow. "He promised to tell you how to take him, Mr. Levendale," he said. "Let's know all we can--we shall have to be in with you on this, you know."