Frederick Algernon Trotteville looked rather cross at first, then he gave a grin. "I am rather fat, aren't I?" he said. "I've an awful appetite, and I expect I eat too much."
"Your parents ought to have known better than to give you three names whose initials spelt FAT," said Daisy. "Poor old Fatty!"
Frederick Algernon sighed. He knew quite well that from now on he would be Fatty. He had already been Tubby and Sausage at school - now he would be Fatty in the holidays. He gazed at the little company of four friends.
"Can I belong to the detective-club?" he asked. "After all, I did tell you about the tramp."
"It isn't a club," said Larry. "It's just us three older ones banding together to solve a mystery."
"And me too!" cried Bets. "Oh, do say I can too! You're not to leave me out!"
"Don't leave her out," said Fatty unexpectedly. "She's only little, but she might be some use. And I think Buster ought to belong too. He might be awfully good at smelling out hidden things."
"What hidden things?" said Larry.
"Oh, I don't know," said Fatty vaguely. "You simply never know what you are going to find when you begin to solve a mystery."
"Oh, let's all belong, Fatty and Buster too. Please!" cried Bets. Buster felt the excitement and began to whine a little, pawing at Larry with a small black foot.