The Disappearing Floor (1940; original text) by Franklin W. DixonFrank and Joe Hardy and their best bud Chet are headed to the woods for a little camping trip. Just by chance there is a scorched envelope in their first night's fire pit with the name "Harry Tanwick" on it and a hundred dollar bill inside. [Will the mystery in this story have anything to do with Harry or the envelope? Not a whole lot. Sorry, if that spoils things too much.] Then...that night Frank wakes to find someone rummagin...
