"You seem extremely busy, Mr. Goon," he said. "Solving another mystery, I suppose? Nice to get the old brains to work, isn't it? I could do with a bit of that myself, after lazing away most of these holidays."

"Oh? You got some brains then?" said Mr. Goon sarcastically. "That's good hearing, that is. But I'm busy now, and can't stop to talk about your brains, Master Frederick. There's Big Things going on, see, and I've got plenty to do without wasting my time talking to you."

"Big Things?" said Fatty, suddenly interested. "What, another Mystery, Mr. Goon? I say—that's..."

"Yes, another Mystery," said Mr. Goon, almost bursting with importance. "And I'm IN CHARGE of it, see? I'm the one that's tackling it, not you interfering kids. And not a word do I tell you about it, not one word. It's Secret and Important, and it's a Matter for the police!"

"But Mr. Goon—you know how we ..." began Fatty anxiously; but the policeman, feeling for once that he had got the better of Fatty, interrupted loftily.

"All I know about you is that you're a conceited, interfering kid what ought to be put in his place and kept there—you and your nasty barking dog! This here case is mine, and I'm already getting on with it, and what's more I’ll get Promotion over this as sure as my name is Theophilus Goon," said the policeman, marching up the steps to the police-station. "You clear-orf now!"

"What a blow!" muttered poor, disappointed Fatty, as Goon disappeared through the door. He and the others walked home slowly, discussing all that Clear-Orf had said.

'To mink of that fat policeman at work on a perfectly gorgeous new mystery that we don't know a thing about!" said Fatty, looking so miserable that Bets put her arm through his. "It's maddening. And the worst of it is that I simply don't see how we are going to find out a thing, if Goon won't tell us."

"Even Buster's upset about it," said Bets. "He's got his tail right down. So have you, poor Fatty. Never mind—you're going to try out your grown-up disguise tomorrow—that will be a bit of excitement for you, Fatty. And for us too!"

"Yes, it will," said Fatty, cheering up a little. "Well—I'll be getting back home now. Got to practise my disguise a bit before I try it out on you all tomorrow. Solong!"