25 frog@holdstonedown-The Bonus Mystery Cache
25 frog@holdstonedown-The Bonus
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Difficulty:
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Terrain:
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Size: 
(small)
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in our disclaimer.
The cache is not at the posted co-ordinates.
You first have to collect the bonus numbers from the creatures@holdstonedown series and then put them into this formula.
N 51 12.(A+B)(C+D)E-F)
W 003 57.(G+H)(I+J)(K-L)
Each number is in two of the caches so it will not matter if you get one DNF.
Cache placed with the kind permission of the National Trust.
Cache is a locktop box...
Additional Hints
(Decrypt)
...haqre tbefr ohfu.