Daisy praised Bets too, but Pip was rather sulky. He was afraid his little sister would get swollen-headed. "If you say much more, Bets will want to be head of the Find-Outers," he said.

"Oh no, I shan't," said Bets happily. "I know it was only a bit of luck, really, Pip. You see, I actually put the pennies into Fatty's hands, and that's how I noticed the clean nails. Pip, I’ll lend you the propelling-pencil whenever you want it. See?"

That was so like Bets. Not even a cross elder brother like Pip could sulk for long with Bets. He grinned at her.

"Thanks, Bets. You're a good Find-Outer, and a good little sport too!"

"I say—look out—here's Goon!” suddenly said Larry, in a low voice. "Better pretend we're not with Fatty, or Goon will wonder why we are hobnobbing with an old Fair woman!"

So they all got up, and left Fatty behind on the seat, with his string of balloons bobbing over his head. Mr. Goon was on his bicycle as usual. He pretended not to notice the children at all. He always seemed busy and important these days!

But he got off his bicycle when he saw the old woman. Fatty was drooping over, pretending to be asleep.

"Here, you!" said Goon. "Move on! And where's your licence to sell balloons?"

The others heard this, and looked alarmed. Did you have to have a licence to peddle balloons? They were sure Fatty hadn't got one.

Fatty took no notice, but gave a gentle snore. Mr. Goon shook the shoulder of the Balloon-woman, and Fatty pretended to awake with a jerk.

"Where's your licence?" said Goon. He was always rude and arrogant to people like the old Balloon-woman.

"What did you say, sir?" said Fatty, in a whining voice. "Want to buy a balloon, sir? What colour do you fancy?"

"I don't want a balloon," said Goon angrily. "I want to see your licence."

"Oh, ah, my licence?" said Fatty, and began to pat all over his extremely voluminous skirts, as if to find where a licence would possibly be hidden. "Somewhere about, sir, somewhere about. If you can just wait a few minutes, kind sir, I'll find it in the pocket of one of my petticoats. An old woman like me, sir, she wants plenty of petticoats. Sleeping out under hedges is cold, sir, even on a summer night."

"Gah!" said Goon rudely, mounted his bicycle and rode off, ringing his bell furiously at a small dog that dared to run across the road in front of him. Was he, the Great Goon, in charge of a First-Class Case, going to wait whilst an old pedlar-woman fished for ages in her petticoats for a licence he didn't really want to see? Gah!

When Goon was safely out of sight the others went back to Fatty, amused and half-alarmed. "Oh, Fatty! How can you act like that with Goon? If only he'd known it was really you!"

"I enjoyed that," said Fatty. "Good thing Goon didn't wait to see my licence though, because I haven't got one, of course. Come on—let's get back home. I'm dying to take off these hot clothes! I’ve got layers of petticoats on to make me fat and shapeless!”

On the way up the village street they passed the bench where they had spoken to the old man on their way to the Fair that afternoon. Bets pointed him out to Fatty.

"Fatty. Do you see that old fellow, sleeping on that bench over there? Well, we thought he was you! And we went and called him Fatty, and Pip gave him a poke in the ribs!”

Fatty stood and looked at the old chap. "You know, it would be quite easy to disguise myself like him," he said. "I've a good mind to try it. Honestly, I believe I could."

"But you couldn't make your ears like his," said Bets. "He's got awful ears."

"No, I couldn't. But I could pull my cap down lower man he does, and hide my ears a bit," said Fatty. "Yes, that would be a very good and easy disguise indeed. I'll try it one day. Did Pip really .poke him in the ribs?"

"Yes. And the old fellow kept on saying, 'Wassat? Wassat?'" said Pip, with a giggle. "He's deaf, poor old thing."

The old man suddenly opened his eyes and saw the children looking at him. He thought they must have spoken to him. He cupped one of his ears in his hand and croaked out his favourite word, "Wassat?"

The old Balloon-woman winked at the children and sat down beside the old fellow. "Fine evening," she said, in the cracked voice the children were beginning to know well.

"Wassat?" said the old man. Then be sniffed, and wiped his nose deftly with the back of his hand. Fatty did exactly the same, which made Bets giggle in delight.

"FINE EVENING," said Fatty. "AND A FINE MORNING TOO!"

"Don't know nothing about mornings," said the old man surprisingly. "Always sleep till midday, I do. Then I gets up, has my bit of dinner, and comes out into the sun. Mornings don't mean nothing to me."

He sniffed again, and then took out his pipe to fill it. Fatty watched all he did. Yes, it would be a marvellous thing to do, to disguise himself as this old fellow. Pipe, sniffs, deafness, and all—Fatty could do it!"

"Come on, Fatty!" said Pip, in a low voice. "We really will have to get back. It's getting late."

Fatty got up and joined them. They soon parted and went their different way—Pip and Bets down their lane, and Larry and Daisy up theirs. Fatty went in at his back gate, and his mother caught sight of the old Balloon-woman, as she stood in the garden, cutting sweet-peas for the table.

"A friend of Cook's, I suppose," she thought; "or is she trying to sell balloons here?"

She waited for the Balloon-woman to come back again, but she didn't. So, rather curious, Mrs. Trotteville went to the kitchen door and looked in. There was no Balloon-woman to be seen—only Cook, red in the face, cooking the dinner.

"Where did that old Balloon-woman go?" said Mrs. Trotteville, in wonder. But Cook didn't know. She hadn't seen any old woman at all. And no wonder—for at that moment the old Balloon-woman was stripping off layers of petticoats down in the shed at the bottom of the garden—to come forth as a very hot and rather untidy Fatty.

"What a peculiar thing for a Balloon-woman to vanish into thin air!" thought Mrs. Trotteville. And so it was.

Fatty had much enjoyed his fun as the old Balloon-woman, and so had the others. He gave Bets the silver propelling-pencil and she was really delighted.

"I've never had such a lovely pencil," she said. "It writes in red and blue, as well as in ordinary lead. Thank you awfully, Fatty."

"The holidays are going too fast," said Pip, rather gloomily. "And we still haven't got a mystery to solve, though we know that Goon has."

"Yes, I know," said Fatty, looking worried. "I can't bear to think of Goon getting busy on his mystery, and we haven't the least idea what it is. Though it may be all those burglaries that are cropping up all over the place, you know—I expect most of the police are keeping their eyes skinned for the gang that is operating such big thefts."

"Can't we keep our eyes skinned too?" said Bets eagerly. "We might see the gang somewhere."

"Idiot! Do you suppose they go about in a crowd together, all looking like burglars?" said Pip scornfully. "They're too jolly clever. They have their own meeting-places their own way of passing on messages, their own ways of disposing of the jewels they steal—haven't they, Fatty? And they are not ways we would be likely to find out, even if we did keep our eyes skinned!"

"Oh," said Bets, disappointed. "Well—can't we ask Inspector Jenks if there really is a mystery here, and ask him to let us help?"

"Yes—why can't we?" said Daisy. "I'm sure he'd tell us. We've helped him such a lot before."

Inspector Jenks was their very good friend. He was what Bets called "a very high-up policeman," and he belonged to the next big town. In the four mysteries the children had solved before, Inspector Jenks had come in at the end, and been very pleased indeed at all the children had found out. Mr. Goon, however, had not been so pleased, because it was most annoying to him to have those "interfering children messing about with the Law"—especially when they had actually found out things he hadn't.