‘Idiot!’ said Pip. ‘I keep telling you you can’t have clues before you’ve got a mystery to solve. Besides, how could Goon’s glove be a clue! You’re a baby.’

‘Well - it was a clue to his presence there in your study yesterday,’ said Fatty, seeing Bets’ eyes fill with tears. ‘But I say - it’s all a bit funny, isn’t it? Do you think Goon is on to some mystery we haven’t heard about, but which your mother and father know of, Pip, and don’t want us to be mixed up in? I know that your parents weren’t very pleased at that adventure we had in the Christmas hols. I wouldn’t be a bit surprised if there isn’t something going on that we children are to be kept out of!’

There was a silence. Put like that it seemed extremely likely. What a shame to be kept out of a mystery when they were such very good detectives!

‘What’s more, I think the mystery’s got something to do with Gladys,’ said Fatty. ‘Fancy! To think there may have been something going on under our very noses and we didn’t know it! There we were snooping about in barns and sheds and all the time there was a mystery in Pip’s own house!’

‘Well - we’ll jolly well find out what it is!’ said Larry. ‘And what’s more, if Goon is on to it, we’ll be on to it too, and we’ll get to the bottom of things before he does! I bet he’d like to do us down just once, so that Inspector Jenks would pat him on the back, and not us, for a change.’

‘How are we going to find out anything?’ asked Daisy. ‘We can’t possibly ask Mrs. Hilton. She’d just shut us up.’

‘I’ll go down and tackle Goon,’ said Fatty, much to every one’s admiration. ‘I’ll take his glove back, and pretend to know lots more than I do - and maybe he’ll let out something.’

‘Yes - you go,’ said Pip. ‘But wait a bit - he thinks you’re in China!’

‘Oh, I’ve come back now after solving the case there very quickly!’ laughed Fatty. ‘Give me the glove, Pip. I’ll go along now. Come with me, Buster. Goon isn’t likely to lose his temper with me quite so violently if you’re there!’

THE ‘NONNIMUS’ LETTER