"About half an hour ago," he said, "a telephone message came on from the City police. They said they'd received some queerish information about this affair, but only particularly about the death of that man down at the hotel in the Docks. Their information ran to this--that the actual murderer has an appointment with some of his associates this afternoon at that tea-house in Hyde Park, and that if the City police would send some plain-clothes men up there he'll be pointed out. So the City lot want us to join them, and I was sent along to meet you here, sir--I've brought those two men and of course there's Chettle. We're all to go along to this tea-house, not in a body, naturally, but to sort of drop in, and to wait events. Of course, sir, that last murder occurred in the City, and so the City police want to come in at it, and--" "No further details?" asked the chief, obviously puzzled. "Nothing as to who's going to point out the murderer, and so on?" "Nothing!" replied Blindway. "At least, nothing reported to us. All we've got to do is to be there, on the spot, and to keep our eyes open for the critical moment." "And what time is the critical moment to be?" asked the chief, a little superciliously. "It all seems remarkably vague, Blindway--why couldn't they give us more news?" "Don't know, sir--they seemed purposely vague," replied the detective. "However, the time fixed is two o'clock. To be there about two--that was the request--at least four of us." The chief turned and summoned the other three men. "You'd better break up," he said. "Two of you approach the place from one way--two from another. It's now a quarter-past one--you've plenty of time. Stroll across the park to this spot--I'll join you by two o'clock. I believe you can get light refreshments at this tea-house; get yourselves something, so as to look like mere loungers--but keep your eyes open." "Do you want me, sir?" asked Chettle, eyeing the parcel with evident desire to know what mystery it concealed. "No--you go with Blindway," answered the chief. "He'll tell you what's happened. I must join Mr. Allerdyke and Mr. Appleyard--then we'll come over to you. Don't take any notice of us." The four detectives went off into Hyde Park, and there separated in couples; the chief turned and went along the straight path which runs parallel with Bayswater Road just within the shrubberies of Kensington Gardens. Presently he caught sight of Allerdyke and Appleyard, who occupied two chairs under a shady hawthorn tree, and he laid hold of another, dragged it to them, and sat down. Each looked a silent inquiry, and the chief, with a smile, held up the parcel.