Correspondence

My Gran is amazing! After she heard I was asking for old things that were of no function and yet people hung onto because they were too important to discard - she knew exactly what I meant and donated a massive envelope full of personal correspondence. Brilliantly, the majority of this correspondence relates to her family history research in the Yorkshire Dales. But the most wonderful thing is that handwritten element. Some of the letters are even written in real ink!!!!
So I have been busy working on them to create a hanging.
I have printed over them with various images from my collection and have been dyeing them in coffee, removing a lot of the personal addresses while the paper was still wet.
I have more to do yet. I was going to hang them with mono-filament and then heard on the radio that this stuff takes 600 years to degrade!! So now I am wondering if there is a more earth friendly way of doing it that is strong enough to hold them.