Welcome to this second 'Don't Bring Your City Ways Here' cache on the Island of Jersey. The first is a tricky find, this second is much easier, but still typifies the City ways.
This is a Wherigo cache so you need to visit the Wherigo website to download the cartridge HERE. I think this may be the first one of these on the island so good luck.
Please be aware, some Pocket PC PDAs may fail to run Wherigo properly due to a known issue with VGA (640x480) resolution screens. Models affected include the Loox 720. Experiment with the Wherigo tutorial cartridge before attempting to find this (and other wherigos) cache if you've not tried to do a Wherigo with your hardware before.
Following the tribulations at this cache today I can tell you the answer to the zone that takes you to the new telescope 'stump' Zone (I assume they are painting them) is...................18. Good luck all.