supplementary evidence. You mayn't know it, but the Greek _alpha_ was supposed in its original form to represent the head and horns of an ox. Bulsaid--_bull's head_.... Got it?" Storm stretched himself. "And I think that's the complete rehash, according to Cocker," he remarked after a pause. "Oh, except for Uncle Joe." "There's a great detective lost in Uncle Joe," said Teal sadly. "D'you know, he cut the wires connecting with the charge of nitrogen trichloride under Buckingham Palace? He heard the Apex threatening you with it and crept along behind the hangings till he found 'em. Uncle Joe's got nerve--he'll be able to write a wonderful book after to-night. By the way, somebody's going to have a ticklish job digging all that H.E. out before the ice melts off it," added Mr. Teal lusciously. "I'll tell you how I figure it out that Uncle Joe found the house," said Storm. "Mattock, I think, must've joined up in the Triangle, once he got a line on the big boss, in the hope of finding out enough to put Hannassay in the Awful Place. Hannassay'd 've been glad to have him in, as it'd make shopping him easier. Matter of fact, Hannassay didn't go on with that scheme--he was too busy trying to get his fifteen million thick 'uns out of the Treasury. Before that, he'd also got Joan Sands in, to give him a bigger hold over Mattock than ever. That was all done through Snooper. Snooper had the telephone tapped and the bookcase put in, and told each of 'em separately not to touch it or talk about it. Mattock didn't associate Snooper with the Triangle at that time, or we'd have been saved a lot of trouble, so he obeyed orders. God knows why! Anyway, after the Piccadilly Circus explosion, Mattock got less dumb. He put two and two together and made--Snooper! So he went chasing Snooper last night, and Uncle Joe trailed _him_. They went down Buckingham Gate in procession, and all landed up in the right place. If we owe something to Uncle Joe, we owe a darn sight more to Jimmy! I said he was going to kill Raegenssen, and, by hookey! he did. What's happened to Uncle Joe, by the way?" Teal grimaced. "Last time I saw him, he was rushing round to talk to Joan. He's been talking to her and pulling the sympathy gag nearly all day. How any man can be so keen on studying criminology," said Mr. Teal, wilfully dense, "beats me." The four of them had dined together, and the silent-footed Cork had not long cleared the table and taken his departure. The coffee cups in front of them were still warm, and yet already a subtle restraint had forced itself into the air. Two of the guests began to wonder if, even in that short time, they had not overstayed their welcome. Mr. Assistant Commissioner William Kennedy glared at Mr. Central Detective-Inspector Teal, and Mr. Teal stared sombrely back at Mr. Kennedy with sleepy eyes. Solemnly each of them nodded to the other. As one man, they rose to their feet.