The general theme for this gentle series of loosely connected
caches is the sea, or rather the lack of it. There are many things
around us that suggest that they should be in a more brine-laden
setting than they actually are.
I do not know who Thomas Spencer-Jackson was, nor why he chose
to slip his cable in such a landlocked place, but 120 years or so
later, he leaves us with a real curiosity to contemplate. In such
contemplation, you can perhaps find your cover for looking for this
hidden cache. It's a magnetic keykeeper, painted to match(ish) it's
surroundings. There are muggle eyes upon you from all directions,
so I have kept it simple and added a give away clue. If you are
really shy, you could search for this one under cover of darkness.
Enjoy!