There is no cache at the published co-ordinates. To find the cache you must solve the simple puzzle below:
A = SKERRIES - DOLPHINS BARN
B = DONNYBROOK
C = NORTH STRAND
D = KILBARRACK + PHIBSBORO
E = BALBRIGGAN - SWORDS
F = DUN LAOGHAIRE - RATHFARNHAM
G = FINGLAS
H= TALLAGHT - KILBARRACK
The cache is hidden at N53 A.BCD W006 E.FGH