They walked sedately down the garden and round the drive to the gates. They went to the dairy, which made real cream-ices that were most delicious, and sat down at the little table in the window to eat them.

Mr. Goon passed by on his bicycle as they sat there. He pedalled furiously, his face hot and red.

"Spot of hard work for Goon," said Fatty, letting a cold spoonful of ice-cream slide as slowly down his throat as possible. "Looks busy, doesn't he?"

Before they had finished their ices, Goon came pedalling back again, as furiously as before. The police-station was just opposite the dairy, and the children watched the policeman go smartly up the steps. Then they saw his head behind the frosted window-pane of one of the rooms in the police-station, talking to somebody else. Goon was talking the most and was nodding vigorously.

"Never seen Goon so busy before!" said Fatty, in astonishment. "Do you think he's really got a case to work on—a mystery to solve that we don't know anything about?"

"Golly, here he comes again!" said Pip, as Goon scuttled out of the police-station, buttoning a big sheaf of papers into his breast-pocket. "He's simply bursting with importance."

"He's feeling jolly pleased about something," said Fatty. "I should be mad if something had cropped up in Peterswood whilst I've been away, and we don't know anything about it!”

Goon jumped on to his bicycle and pedalled away again. It was maddening to sit there and watch him so busy and important and not know why. Fatty felt as if he was bursting with curiosity.

"He's on to something!" he said. "He really is. I know that look on his face. We must find out what it is!"

"Well, you find out then," said Larry. "And if he tells you, you'll be lucky! It's what Goon has dreamed of for months—a mystery all to himself, that the Five Find-Outers don't know anything about!”

"I can't bear it!” said Fatty, and let the last spoonful of ice-cream go down his throat. Then he looked dismayed. "Oh I say—do you know, I was so puzzled about Old Clear-Orf and his mystery that I ate that ice-cream without tasting it. What a fearful waste. I'll have to have another."

The others looked at him. "There's no more money," said Pip. "We spent it all."

"I've got some," said Fatty, and dug his hand into his pocket. He always had plenty of money, much to the envy of the others, who had pocket-money each Saturday and had to make that do for the week, like most children. But Fatty had plenty of rich relations, who seemed to pour money into his pockets in a most lavish way.

"Mother says it's bad for you to have so much money," said Pip. "She's always saying that."

"It probably is bad for me," said Fatty, "but I'm not going round telling my relations to stop giving me tips. Now, who wants another ice-cream? Bets?"

"Oh, Fatty, I couldn't," sighed Bets sadly. "I'd love to, but I know I can't. I feel a bit sick already."

"Well, go outside," said Pip unfeelingly. "No thanks, Fatty. I don't feel sick, but I shan't eat any supper if I have another, and then Mother will stop all ice-creams for a week, or something awful."

Larry and Daisy said they couldn't possibly eat another either, so Fatty had a second one all by himself, and this time he said he tasted every spoonful, so it wasn't wasted as the first one had been.

Mr. Goon came back on his bicycle, just as the children left the shop. "There he is again!" said Fatty admiringly. "I've never seen him move so quickly. Good evening, Mr. Goon!"

Mr. Goon was just getting off his bicycle to go into the police-station again. He glanced at Fatty, and took no notice of him. Fatty was annoyed.

"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!"

Next morning Larry had a note from Fatty.

"Go down to the side-shows by the river this afternoon. I'll meet you somewhere in disguise. Bet you won't know me!

"Fatty."

Larry showed the note to Pip and Bets when he went to see them that morning. Bets was thrilled. "What will Fatty be dressed in? I bet I'll know him! Oh, I can't wait for this afternoon to come!"

Larry's mother gave him some money to spend at the side-shows when she heard they were all going there that afternoon. They set off at two o'clock, ready to spot Fatty, no matter how well he was disguised.

As they walked down the village street an old bent man came shuffling up towards them. He stooped badly and dragged his feet, which were in old boots, the toes cracked and the heels worn down. He wore a straggly sandy-grey beard, and had shaggy grey eyebrows, and he looked extremely dirty. His coat sagged away from his bent shoulders, and his corduroy trousers were tied up with string at the knees.

His hat was too large for him and was crammed down over his head. He had a stick in his hand and used it to help himself along. He shuffled to a bench and sat down in the sun, sniffing loudly.

"That's Fatty! I know it is!" said Bets. "It's just the sort of disguise he'd put on. Isn't he clever? "

The old man took a pipe out of his pocket and began to stuff it with tobacco.

"Fancy Fatty even thinking of bringing a pipe!" said Pip. "I bet he's watched his father stuffing tobacco into his pipe. Golly—don't say he's even going to smoke it!"

Apparently he was! Great puffs of rather evil-smelling, strong smoke came wafting out from the old man. The children stared. "I shouldn't have thought Fatty could smoke," said Larry. "He oughtn't to. He's not old enough. But I suppose if he's in disguise..."