Hello Brian, I think, you should ask a conservator for books and papers what you could do. Try it at a specialized museum, perhaps the National Trust.

If the damage is not too great, I´m shure, you can stabilisate parts yourself for example with wallpaper paste or other cellulose products.
To give a detailled information, you should describe your problem more precise.

I´m sorry about my English. In special things it is difficult to find the right words.
Greetings Martin