You need to do three things very quickly:
1. Contact a paper preservationist and allow that person to preserve those historical documents properly.
2. Contact Huey or another proper British case maker and ensure that your repairs are period correct and to period standards.
3. Sell that rifle to ME!!
(or put these in reverse order and I'll take care of the papers and case!)

Oh, the scope looks like a Davidson scope like used by Fraser. I don't have mine available to compare but it is very similar, probably just a bit later made.

Envious.