"Come to think of it, I did get up once. I heard the cat growling, or thought I did, but after I had looked out and seen nothing, nor heard anything, I went back to bed again and didn't know anything more till sun-up. I guess I'm pretty slow. I'm getting old for a certainty."
"No; there is something peculiar, something very strange about this affair, Professor," spoke up Tad.
"Due wholly to natural causes," declared the Professor.
"No, I reckon you're wrong there, Professor," said Nance. "I'd have understood natural causes. It's the unnatural causes that gets a fellow."
"I've spotted it, I've spotted it! I know who freed the lion!" howled Stacy.
All hands rushed to him.
"Who, what, how, where, when?" demanded five voices at once.
"Yes, sir, I've found it. That lion——-"
"Don't joke," rebuked the Professor.
"I'm not joking. I know what I'm talking about. That cat was let go by a one-legged Indian. Now maybe you won't say I'm not a natural born sleuth," exclaimed the fat boy proudly.