The following short story cryptically conceals information which will help you solve this puzzle. Identify A-K (missing I) in the order they appear then find an appropriate order which will enable you to find the necessary co-ordinates.
Jack loved to jabber. He was always looking for the opportunity to have a chat and he didn’t really care whether anyone was listening to him. Often he could be found out in the garden chatting with Nibbler feeding her with carrots he’d fetch from the fridge.
“Bo”, said Roxie his sister “ I guessed you’d be here” she said. "I hope she can understand you – more than I do".
The cache can be found at:
N51 1J.KBF
W000 3(A-G).H(E-K)(C-D-J)
