CHAPTER I
TRYING OUT THE NEW BIPLANE
"I tell you, Elephant, it's the Bird boys, and nobody else!"
"But they had a monoplane last summer, Larry; and you can see for yourself it's a biplane out yonder over the lake. So that's why I thought it must be Percy Carberry and his crony, Sandy Hollingshead."
"Shucks! stir up your think-box, Elephant. Get a move on your mind, and look back. Don't you remember Percy lost his old biplane when he took that...
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