The Valley of the Angels
There is a legend told of St Patrick that he and his companions came one day to a certain valley to rest. Suddenly "they beheld the valley filled with a heavenly light and with a multitude of the host of heaven they heard, as chanted forth from the voice of angels, the psalmody of the celestial choir".
They named the place "Vallis Angelorum" – the Valley of the Angels. In the process of time there was built in this valley a holy place – called Bangor.
To find the holy grail you must first educate yourself on the history of the Saints who are connected with Bangor.
From the first sign at the starting point, find the year in which Malachy first came to Bangor.
A = last digit of this year - first digit of this year
From the second sign at waypoint "Gall", find the year in which Gall had a vision of the death of Columbanus.
B = first digit of this year + 2
C = last digit of this year - 5
From the third sign at waypoint "Columbanus", find the year in which Columbanus left the Bangor monastery.
D = last digit of this year x 2
From the fourth sign at waypoint "Comgall", find the year in which Comgall founded Bangor Abbey.
E = first digit of this year
From the last sign at waypoint "Bangor Castle", find the number of rooms in the castle.
F = the first digit of this number + the last digit of this number
The cache can be found at coordinates
N 54 39.ABC, W 005 40.DEF
You can check your answers for this puzzle on GeoChecker.com.
Good luck!
Congratulations to mccavana20 on getting the FTF!.