* Tom's Treasure Hunt: Tom and his friends create a treasure map and go on a treasure hunt, which could be considered a "manuscript" of sorts. However, this is more of a play scenario than a written document.
* Tom's Journal: While not explicitly mentioned, Tom could potentially be keeping a journal of his adventures, which would be a manuscript. This is purely speculative, however.
* The Gang's Code: The boys' gang, the "Robber's Cave," might have a secret code or rules written down, which could be considered a "manuscript." Again, this is not explicitly mentioned in the book.
It's important to remember that the book focuses on the boys' adventures and interactions, rather than their specific literary creations.
If you're thinking about a particular scene or passage, please provide more context so I can assist you better!