Here's why:
* "Picador Though He 50 these prints mine is numbered" doesn't sound like a real book title. It's possible there's a typo or you're remembering the title incorrectly.
* Signed and numbered prints are typically associated with artworks, not books. While signed and numbered editions of books exist, they're often limited-edition runs and would usually have a clear title and author.
To clarify the situation, you should:
1. Check the title of the book: Double-check the title carefully. It's possible you misremembered a part of it.
2. Examine the book itself: Look for a title page, an author's name, and any other identifying information.
3. Research the book: Search online for the title you believe is correct. This will help you determine if it's a real book and if there are signed or numbered editions.
If you can provide more details about the book (e.g., author, publication date), it might be easier to figure out what you have.