"Oh, Fatty!" cried Bets, when she saw him. "You've come back at last! Whatever happened? And how frightfully hot you look!"

Buster welcomed Fatty uproariously. He had been left behind with Larry, in case Fatty had to do some quick shadowing. Fatty looked at him.

"I feel as if my tongue's hanging out like Buster's, I'm so hot and thirsty," he said. "I must have an iced gingerbeer. Come and sit with me whilst I have it, and I'll tell you what's happened!"

"Did Number Three lead you to the missing pearls?" asked Bets excitedly, as Fatty went to the gingerbeer stall. He shook his head.

"Come on over to the grass here," he said, and led the way. He flung himself down and drank his gingerbeer in long, thirsty gulps. "Golly! This is the very best drink I've ever had in my life!"

Soon he was telling the others about the wild-goose chase that Number Three had led both him and Mr. Goon. They listened eagerly. How annoying of Goon to butt in like that! They laughed when they thought of the poor, hot, fat policeman pedalling valiantly up hill and down after Number Three.

"What a shame you had a puncture," said Bets. "Still, Fatty, I'm sure Number Three would never lead you or Goon to where the pearls were, once he knew he was being followed! He might not have known that you were shadowing him—but he simply couldn't help knowing that Goon was!"

Fatty finished his iced gingerbeer and ordered another. He said he had never been so thirsty in his life. "When I think of poor, hot Goon, pedalling away still for dear life, and feeling as thirsty as I am—well, all I can say is that I'm jolly glad I got a puncture!" said Fatty, drinking again. "I should think Goon will end up somewhere in Scotland, by the time he's finished this bike-ride!"

"All the same," said Larry, "it's a bit sickening that we aren't any nearer solving the mystery of where those pearls are hidden. Instead of the man leading us to them—he seems bent on going as far from them as he can!"

"I wonder if that old fellow did give him a message," said Pip, frowning. "You're sure you didn't see any sign of a message at all? Let's think now. All that old Johnny did was to mess about in the dust, drawing patterns with his stick. Nothing else."