In order to be able to find this one, you must first complete the local Adventure lab series called Chepstow Castle and Port Wall.
This adventure lab series has been designed to be not as simple as find a word on a aign and put it in the answer box. However every stage has a little puzzel, they arnt hard and from experience are pretty standard puzzels in the geocaching world. So please enjoy
Please be careful replacing. Be aware of Muggles, especially during tourist season.
May need tweezers
To complete Adventure Labs you need to download the app.
Have fun!