Lympne is a small village lying on top of the cliffs which overlook Hythe and the English Channel.
The entrance to the River Rother emerged to the sea here before Roman times, however it has changed its course twice since then, the first time it emerged at New Romney and now reaches the sea at Rye about 20 miles to the south east.
It dates back to Roman times when Portus Lemanus was built to protect the Roman ships in the harbour below the current village. They built a castle to protect the old river entrance from raiders from the Scandinavians. The castle now known as Stutfall Castle is lower than the Romans built it, as the cliff has slipped since it was built.
The cache is not at the listed coords but you will find a plaque and on the you will need to work out the following information. Act of Parliament A B C D - E F G H
N51 04. (C-H) (D+H) /B) (A+B) -C)
E001 01. (A*A) (H-A) (C-B) +H+E)