"I thought some one came along and stole it," Ned replied. "I was afraid to ask about it for fear I'd be arrested. I didn't even dare go for my trunk." "That's safe at the depot," said Bart, "but you'll have to pay storage charges on it. Well, well, how this thing has worked out!" "We've solved two mysteries instead of one," Frank remarked. "Here's William ready to go back to his mother," and he told Ned who William was. "So you're the boy who was watching me this afternoon when Cassidy came for me?" Ned asked. "I was afraid you might be a detective, and so I wouldn't admit who I was." "We'll start for home in the morning," declared Mr. Wilding. "And maybe get into more trouble there," put in Fenn. "How?" asked Ned. "If there's any more trouble I want to get it all over with at once." "They suspect us of blowing up the school tower!" exclaimed Frank. "Oh, that!" cried Mr. Wilding. "I guess I forgot to tell you about that, I was so busy thinking of Ned. That's all cleared up!" "How?" asked Bart. "They found out it was done by a wicked boy named Peter Sanderson. He thought it was a joke to set off a dynamite cartridge, but he found out it wasn't. He's been sent to the reform school and his father has to pay a big bill for damages. I got a letter from Fenn's father this morning, telling me all about it. So you boys can go home with everything cleared up." "And we'll take William with us," said Bart. "Yes, of course. I guess William's troubles are over too. We need a boy in the bank, and I think he will fill the bill," and Mr. Wilding laughed. They were all so excited that none of them slept well that night, but they were up early and started back for Darewell. Ned rather expected his father would express regret at the loss of the hundred dollars, for Detective Reilly said there was little chance of the money ever being recovered. Mr. Wilding, however, did not refer to it, until Ned, anxious to know how his parent felt, remarked: "I guess I'm not much of a business man, dad." "Why so?" inquired Mr. Wilding with a smile. "Why, I lost my hundred dollars the first thing." "Not exactly lost it, Ned, though you haven't got it. You can consider that you bought a hundred dollars worth of experience, and I think you got quite a lot for your money." "I certainly did," replied Ned with conviction. "By the way," his father went on. "I got a telegram from your aunt. Her niece in Chicago is not as ill as was at first believed, and Mrs. Kenfield is coming home soon. She wants you boys to stay and visit her. Your uncle will be home from Europe in another week." "I think I'd rather go home for a while," answered Ned. "Well, everything came out all right," remarked Bart as he and Fenn sat together looking from the car windows as they approached their destination. "Yes, everything is right but Frank," replied Fenn. "He's been acting strangely lately," and he nodded toward his chum who sat alone in a seat on the other side of the car.