The red-headed boy, curious at their sudden intense interest in Napoleon, came over and joined them.

"What's exciting about Wm?" he said. "Who is he? Oh—Napoleon. What was he? Some sort of soldier? "

"Don't you know?” said Bets, in astonishment. "Didn't you learn history at school?"

"I've never been to school," said the red-headed boy. "I belong to the Fair, and us kids hardly ever go to school unless we have to. We move about from place to place, you see, and before we're popped into some school, we've moved on again. I can read, but I can't write."

"Why are you in the Waxwork Show?" asked Fatty. "Does this hall belong to the Fair people?"

"Oh no—they've only hired it," said the boy. "The Waxworks belong to my uncle. He's the fellow that runs the Hoopla. I used to help him with that, but now I have to do the Waxworks, and it's jolly dull."

Fatty wondered if any of the Fair people were in the gang of thieves. It seemed very likely. Well, he would know on Tuesday night.

The children went and studied other figures carefully too, so that the red-headed boy wouldn't get suspicious about their sudden interest in Napoleon. They had a good look at the wax figure of the policeman as well. He really did look a bit like Mr. Goon! There he stood, on the second step, not far from Napoleon, his helmet on perfectly straight, the strap round the chin, and the belt a little tight.

The red-headed boy disappeared out-of-doors for a minute. Fatty at once went back to Napoleon and studied the clothes well, to make sure that he could take them off the wax figure fairly easily.

"Hope they're not stuck on in any way," he said to the others anxiously. Daisy pulled at them.

"Oh no," she said. "They are put on just like ours—and look, the trousers are held by braces. You'll be all right, Fatty. But you'll have to be here long before nine, or you'll never have time to undress yourself and Napoleon and then dress yourself up again."

"I wish you wouldn't, really, Fatty," said Bets, looking up at him with scared eyes. "I shall hate to think of you standing so near the gang—whatever would they do to you if they discovered you? "

"They won't," said Fatty. "I shan't give myself away, you may be sure of that. I've already been practising standing still for ages, in my bedroom, in exactly that position. Buster simply can't understand it. He does all he can to make me move!"

The others laughed. They could quite well picture Fatty standing solemnly in his room, perfectly still, with a most astonished Buster trying in vain to get a movement or a sound out of him!

"Come on—let's go now," said Fatty. "It's most frightfully hot in here. Hallo—there's Goon—and in uniform again! He looks better in uniform than in plain clothes, I must say. Not that he's much to look at in either!"

Mr. Goon was standing just outside the Waxworks Hall, apparently about to go in. He scowled when he saw the children. Funny how those kids always seemed to turn up everywhere!

"What are you doing here?" he asked, in a suspicious voice.

"Passing the time away, Mr. Goon, just passing the time," said Fatty airily. "What are you doing here? Is your holiday over? You must miss your little trips to the sweet-shop."

Buster was on the lead, or he would certainly have darted at his enemy. But Fatty, seeing the black look on Mr. Goon's face, hastily dragged him away.

"Wonder what he's done with that grocery list!" said Daisy, with a giggle. "Put it with his Clues, I expect. Well, we know more about that than he does!"

Bets wanted to go down by the river, so the others went, too, meaning to walk home by the river-path. Bets stared hard at every one in boats, and Pip noticed her.

"Why ever are you glaring at every one who's in a boat? "he asked.

"I'm not glaring," said Bets. "I'm just looking to see if I can spot anyone with odd eyes, that's all. I did see the odd-eyed man in a boat, you know, when that punt knocked against me—and I might quite well see him again."

"What would you do if you did?" demanded Pip. "Jump in and arrest him? "

"It's quite a good idea of Bets," said Fatty, always quick to defend the little girl. "After all, if the man was here, he might be again. And if we saw him on the river we could get the name of the boat, and, if it was privately owned, we could find out the name of the owner."

"The only thing is—people go by so quickly that it's difficult to see if their eyes are odd or not," said Bets.

"I say, Fatty, how are you going to get your face all pink like Napoleon's?" asked Larry looking at Fatty's very brown face.

"Easy," said Fatty. "I shall put a little layer of pink wax all over my face and let it set. I know how to do it. It's in a book I've got."

Fatty had the most extraordinary collection of books. He seemed to be able to find out from them anything he wanted.

"You'll have to do that before you set out, won't you?" said Daisy. Fatty nodded.

"Yes. Larry will have to go with me if the night isn't dark enough to hide me, and warn me if any one is coming who might be likely to spot me. But now that there's no moon, I ought not to be noticed much in the twilight."

"I do want Tuesday to come!" said Bets. "I really can hardly wait! I wish I was going to see you all dressed up as Napoleon, Fatty. You'll look simply grand. Oh, Tuesday, hurry up and come!"

Tuesday Night At Last.

Tuesday night did come at last. For once in a way it was a cloudy night, and it almost looked as if the longed-for rain was coming. It was a little cooler, and every one was thankful.

"How are you going to manage about your father and mother tonight?" asked Pip. "I mean—you want to set off about 7:30, don't you? And that's the time you have dinner with them."

"They're away for a couple of nights," said Fatty. "Bit of luck, that. Larry, you come to dinner with me, and we'll have it at seven, together. Then you can walk down with me to the Hall, to make sure no one will see me."

"Right," said Larry. "I will. Wish I was going to come into the Hall with you, too, and see everything. Will you come back and tell us what's happened, Fatty, even if it's awfully late? I'll keep awake."

"All right. But I'd better not go to Pip's," said Fatty. "Mrs. Hilton is sure to hear me if I call up to Pip. Her room is just nearby."

"Oh, Fatty! We can't possibly wait till the morning! "cried Bets.

"You'll have to," said Fatty. "I can't go round to you all and tell you what's happened. Anyway, you'll be fast asleep, little Bets!"

"I shan't. I shan't sleep a wink all night," said Bets.

The day dragged by very slowly. At half-past six Fatty left Pip's, with Larry, and the two of them went to Fatty's house. They were to have dinner early, at seven—then their adventure would begin. All the children felt excited, but only Fatty did not show it. He appeared to be as calm as ever.

The two boys made a very good meal indeed. Then Fatty put the pink stuff on his face and after that they set out to go down to the river. They meant to take the path over the fields, then go by the water-side, and so come to the Fair without meeting a lot of people.

They arrived at the Waxworks Hall. "How are you going to get in?" whispered Larry, suddenly seeing that the place was shut and in darkness.

"Didn't you spot me undoing the catch of one of the windows when we were here this morning?" whispered Fatty. "I'm going to get in there. I say—what about you coming in too, in case I get into difficulties over dressing? You can easily hop out of the window afterwards."

"Yes, I will," said Larry, pleased at the idea of watching Fatty dress himself as Napoleon. "Where's the window?"