Bridget,
Dara is perfectly right. It is like an up turned teacup and for many years I have found the bendy bit most useful to decipher ancient scrall.
I put mine to the computer screen and could clearly see plenty of writing including the roundel. I promise I had my glasses on then. Work on it literally one square inch at a time .The roundel may have a date.
This will not beat us. Its great to have such photos.
Do not write on it again and if you must use a soft pencil on the REAR.
Come back and let us make progress.
Regards Quaxer