The Tale Of Timothy Turtle in "Timothy Needs Help"

"Aren't you afraid," he added, "that you'll wear out the surface of the creek, gazing into it? I shouldn't like that very well," said Peter Mink, "because then it couldn't freeze in winter, and you know it's great sport to hunt muskrats under the ice."
Well, Peter's speech alarmed Timothy Turtle. And yet he felt that he could not rest until he knew what was on his back. So he asked Peter Mink to meet him on the bank.

"I want you to help me," he said. "I have reason to believe that there's something written on my back. And you must tell me what it is."