"Yes, sir," said Fatty. "With Mr. Goon, as well, sir."

"Well, unfortunately he gave Mr. Goon the slip," said the Inspector. "Mr. Goon rang me up, and I came over because it is imperative that we keep an eye on Number Three, if we can, owing to his knowledge of where the pearls are hidden. Did you by any chance see the man, after you had got your puncture?"

"No, sir," said Fatty. "Haven't set eyes on him."

The Inspector gave an annoyed exclamation. "We must get Number Three. We've found out that he is the ring-leader, and the man we want most of all! And now if he get those pearls, wherever they are, and clears off, sooner or later these burglaries will start all over again. He will find it quite easy to start a new gang."

Mr. Goon looked very down in the mouth. He also looked hot and tired.

"He's a clever fellow, sir," he said to the Inspector. "Very clever. I don't know how he managed to give me the slip, sir."

"Never mind, Mr. Goon," said Fatty comfortingly. "I can tell the Inspector where the pearls are, and how you can catch Number Three if you want to."

Mr. Goon stared disbelievingly at Fatty. "Gah!" he said. "You make me tired. Talking a lot of tommy-rot! I don't believe a word of it!"

"What do you mean, Frederick?" said the Inspector, startled.

Fatty drew the pearl necklace out of his pocket. Mr. Goon gasped and his eyes bulged more than ever. The Inspector stared in amazement too. He took the pearls from Fatty. All the children crowded round in excitement.

"Frederick! These are the missing pearls! A double row of the very finest graded pearls there are," said the Inspector. "My dear boy—where did you get them!"

"Oh—we played a little game of Hunt-the-Thimble with Bets—and she told us where they were," said Fatty, and Mr. Goon gave a disbelieving snort. "They were round Queen Elizabeth's neck, in the Waxworks Hall, Inspector—a very clever place—and Bets thought of it!"

"Certainly a very clever place," said the Inspector, "and a very clever thought of yours, little Bets, if I may say so!" he said, turning to the delighted little girl. "They must have been shining there under the noses of hundreds of people today—and nobody so much as guessed! But now, Frederick—how do you propose that we lay hands on Number Three?”

"Well, sir—he knows that the pearls were hidden in the Waxworks Hall," said Fatty, "and maybe knows too that they were on Queen Elizabeth's neck—so he's bound to go back for them, sir, when every one has gone, and the Hall is dark and empty. Oh, sir—could I come and hide in the Hall tonight when you do your spot of arresting!"

"No," said the Inspector. "I'm afraid not. I'll have three men posted there. See to that straight-away, please, Goon. Er—I'm sure we can congratulate the Find-Outers on solving our problems for us in such a praiseworthy way—don't you think so, Goon? "

Goon murmured something that sounded suspiciously like "Gah!"

"What did you say, Goon?" said the Inspector. "You were agreeing with me, I imagine?"

"Er—yessir, yessir," said Goon hurriedly, and turned a familiar purple. "I'll get the men now, sir."

He hurried off, and the children saw that even the back of poor Goon's neck was bright purple too. The Inspector slipped the pearls into his pocket and beamed all round.

"Well, once more, you've done remarkably well," he said, "though I must confess I was a little annoyed with you, Frederick, for running heedlessly into danger. Still, as usual, you've used your brains, and have helped a great deal. Especially little Bets, if she really did think where the necklace might be."

"Oh, she did," said every one, even Pip, and Bets went as red as a tomato with pride. She might be the youngest of the Find-Outers—but she was just as good as any of them!

"Now—I can take it that you will respect my wishes and not go near the Waxworks Hail tonight?" said the Inspector, raising his eyebrows at them all. They nodded vigorously.

"You can trust us, Inspector. But tell us in the morning if you've got Number Three, won't you?" said Fatty.

And in the morning the Find-Outers heard what had happened. Number Three had let himself into the Hall at midnight. He had walked to Queen Elizabeth, and had fumbled at the jewellery round her neck—and just as he was fumbling, out stepped three burly men and caught him!

"Now he's in a cell thinking sadly over his sins," said the Inspector, over (the telephone. "We've got the whole gang—and the necklace too. Good work! We certainly couldn't have done without you Find-Outers. What about you all joining my police-force? We could do with you!"

"Oh, how I wish we could!" said Bets, afterwards. "I suppose he didn't really mean it, did he? "

"And now to think we've got to help with our packing and go back to school!” said Pip, in disgust. "After ail our fine detective work, we've got to go and learn the chief rivers of the world, and the date when Queen Elizabeth came to the throne, and how much wheat Canada grows, and..."

"Never mind—well have another Mystery to solve next hols," said Bets happily. "Won't we, Fatty?"

Fatty grinned at her. "I hope so, little Bets," he said. "I really do hope so!"

I hope so too. It would be most disappointing if they didn't!