A nice easy Multi cache here
Around the Given Co-ords you will find a Plaque, from this you need to answer the following question
??? WHEN WAS THE OX ROASTED ON THE GREEN ???
Answer = A, B, CDEF. ( where febuary=2, april=4 Etc --- )
Now to locate where the cache is place complete the following
N51' (F-B), (A-B) . (E+B), (A-C), (D-C)
E000' (F-B-C), (D-B) . (E), (D-E), (E+C)