"You do sound grown-up," said Bets. "Doesn't he, everybody?"

"Well, as a matter of fact," said Fatty, swelling up a little with pride, "I'm the tallest boy in my form now, and you should just see the muscles in my arms. I'll show you!”

"Same old Fatty!" said Larry. "Best in everything, aren't you? Nobody to beat you!"

Fatty grinned and peeled off his shirt. He bent his arm and showed them how his muscles came up in a big lump. Bets looked on in awe, but Larry and Pip did not seem to be much impressed.

"Fair!" said Larry. "I've seen better ones on a boy of twelve!”

"Huh! You're jealous!" said Fatty, good-humouredly. "Now then—let's hear any Peterswood news, Pip and Bets. The village seemed pretty crowded when I came through it just now."

"Too jolly crowded for anything!" said Pip. "This hot weather is drawing the people to the river in their hundreds! We get motor-coaches all day long—and down by the river there are all sorts of shows to amuse the people when they get tired of the river, or it's raining."

"What sort of shows?" asked Fatty, lying down on the grass, and tickling Buster on his tummy. "Any good?"

"Not much," said Pip. "There's a Waxwork Show—pretty dull really—you know, figures made of wax, all dressed up—and there are those Bumping Motor-Cars—they're quite fun for the first two or three times you go in them...."

"And a Hoopla game," said Bets. "You buy three wooden rings for twopence, and you try to throw them over any of the things arranged on a big round table—and if the ring goes right over anything, you can have whatever you've ringed. I like that game."

"You would!" said Pip. "She spends a whole shilling on hiring the wooden rings—and then wins a mouldy little brooch worth a penny, that Mother can't bear and won't let her wear!”

"Well, Pip, you spent tenpence once, and you didn't win a thing!" began Bets hotly. But Fatty interrupted.

"Sounds as if Peterswood is going quite gay!" he said. "Well have to make up a party and go down to all these shows one wet afternoon. If it ever is wet again!"

"Fatty, win you go in one of your new grown-up disguises?" asked Bets excitedly. "Oh, do! It would be lovely to see you acting like a grown-up, and taking everybody in!"

"Ill see," said Fatty. "I'd like to take in Old Clear-Orf, I must say! He's up to all my boy-disguises now—he'd see through them at once—but I bet he wouldn't see through a grown-up disguise!"

"What will you go as?" asked Daisy.

"Don't know," said Fatty. "And listen, all of you—if you can get any old things of your fathers'—you know, old hats they don't want, or boots, or even old coats—they'd come in mighty useful for me. I'm afraid if I take too many of my father's things, he'll be annoyed. Mother doesn't let him keep any of his old things, she gives them away—so he's only got rather newish clothes."

"We'll do what we can," promised Larry, and Pip nodded too. Anything to help old Fatty to disguise himself! Bets sighed with joy to think that Fatty was back again. Now life would really be exciting once more. And oh, if only a mystery turned up, how heavenly the rest of the hols would be!

It was lovely to be all together again, day after day. The Five bathed in the river, went for long bicycle rides, lazed in the garden, squabbled, drank pints of iced drinks, and ate hundreds of ices. Buster liked both lemonade and ices and had his full share. He got rather fat and Pip teased him.

"You're too fat to go after rabbits, Buster!" he said. "Why, even a mouse would escape you now. You don't walk any more, you waddle. You don't breathe, you wheeze! You..."

"Oh, don't tease him so," said Bets, who was always quite certain that Buster could understand every single word said to him. "He doesn't waddle. I bet if he saw Old Clear-Orf this very minute he'd be after him like a shot!"

"By the way, what's happened to Goon?" asked Fatty. "I saw him yesterday, in a great hurry and looking frightfully important."

"Probably solving some Mystery we don't know anything about," said Larry gloomily. "There have been a lot of burglaries lately, and perhaps Goon is getting at the bottom of them.

"Yes—but the burglaries haven't been in his district," said Fatty. "They've mostly been miles away. I've read about them in the paper. Lady Rexham's jewels were stolen only last week—and somebody else's famous diamonds the week before. It's a clever gang of thieves—but they're not working this district, as far as I know."

"I wish they were!" said Bets. "Then we could catch them. You could put on one of your new disguises, Fatty, and track them down."

"It's not as easy as all that, little Bets, and you know it!" said Fatty, with a laugh. "You just think of all the difficulties we had in our other mysteries."

"We haven't seen you in any grown-up disguise yet, Fatty," said Daisy. "Do put one on, so that we can spot you in it, if we can."

"I've been practising in my bedroom," said Fatty. "I don't want to try anything out on you till I'm perfect. I'll try it on you when I'm ready, I promise. And I'll give my second-best propelling-pencil to any one of you that spots me first, see?"

"Oooh, Fatty—the pencil that can write in lead, or in red, or in blue?" said Bets. "Can you really spare it?"

"I'll certainly give it to any of the Find-Outers if they're bright enough to spot me in my first grown-up disguise," said Fatty. "It's a bargain!”

"I bet I’ll spot you first," said Larry. "The girls won't, I'm sure. Pip might—but I'll be first!"

"We'll have to leave Buster behind when we try to-do the spotting," said Pip. "Or hell simply rush up to you and bark madly to tell every one it's you!"

"Yes. Buster's out of this," said Fatty, and Buster cocked up his ears at his name. "Sorry, Buster, old boy—but tomorrow you must stay at home with the cat." "Oh, Fatty—are you going to dress up tomorrow?” asked Bets, in delight. "Really tomorrow? Well, you won't deceive me! I shall look at every one with an eagle eye!”

"Right," said Fatty. "But all the same—I have a feeling that my propelling-pencil will still be safely in my pocket tomorrow night! You may be quite good Find-Outers—but I’m a bit cleverer than any of you!"

"You're certainly best at boasting!" said Larry. "That trumpet of yours must be quite worn out by now."

"What trumpet?" said Bets, in curiosity. "I've never seen Fatty with a trumpet."

"No, but surely you've heard him blowing his own trumpet? " said Larry. "It's deafening at times! It's..."

And then Fatty sat up and flung himself on Larry and there was a great deal of shouting and yelling and squealing, with Buster plunging into the middle of the brawl and getting wildly excited too.

Mrs. Hilton, Pip's mother, appeared. "Children! You do know I've visitors in the garden, surely? If you want to yell and squeal and fight, will you go somewhere else? What about a nice walk?"

"Oh Mother—it's too hot for a walk!” groaned Pip.

"Well, I should have thought it was much too hot to fight," said Mrs. Hilton disapprovingly. "Really, Larry and Frederick, you look very dirty and untidy!"

"Sorry, Mrs. Hilton," said Fatty meekly, and Larry tried to smooth his hair down. "Well go for a walk. I forgot you bad people to tea in the garden. I really do apologize."

Fatty had marvellous manners with grown-up people, and Mrs. Hilton began to smile again. "Go down to the dairy and get yourselves an ice-cream each," she said. "That will get rid of you for a bit. Here's the money, Pip."

"Oh thanks, Mother," said Pip, and they all got up, pleased. It was the fourth ice-cream that day, but it didn't seem worth while mentioning that to Mrs. Hilton. Fatty's mother had already provided ice-creams and so had Larry's, and Fatty had generously given them one each as well. Now this was the fourth lot. Goody!