What an intriguing Find? Can you help solve this conundrum?

A wonderful document with a cryptic note and possible cypher with references to Cromwell Charles 1st and the King of France, is this something you have knowledge of? if so please do contact us so we can help the kind people who brought this important find to us. This is at the WDYTYA 2012 Live Show at Olympia.

We have managed to take some quick scans but see if you can help find out some more connections to this document.

Here follows the cryptic note: