Can you post photographs of the records (e.g., provenance), and photographs of the gun, as well? You, indeed, may have a firearm linked to Annie Oakley, or it may be circumstantial evidence or not true at all. If you post it for all to see, we can maybe help you, and give you accolades for your rare find, or give suggestions and advice before you run around trying to find additional records and provenance for something that isn't quite as good as it seems to be.