a Stornoway & North Lewis
b Orkney Mainland
c Shetland North Mainland
d Raasay & Applecross
e Lairg & Loch Shin
f Loch Assynt
g Gairloch & Ullapool
h Sound of Harris
i Tobermory & North Mull
j Barra & South Uist
The real co-ordinates for the cache are:
N (a x b) + (c + 2) ‘ (d x 2) +(e - f) . 0 (b x e) + 2
W 00 (g – h) ‘ i . (f x j) – 1
You can check your answers for this puzzle on GeoChecker.com.