The cache is not at listed coordinates. First you have to do a little brain excercise and then a small walk through the park on the grounds of Malahide Castle .......
Samurai Sudoku
A - number in the red square
B - number in the yellow square
C - number in the blue square
D - number in the green square
E - number in the brown square
Final coordinates
53.D(B+C+D).A(A+B)(D+C)
006.B+C+D+E.(A-C-E)EE
The cache
The cache contains only logbook, please bring your own pen . Please rehide it well to prevent many muggles from discovering it.
The opening hours for Malahide Demesne
November to January: 10.00am - 5.00pm February to March 10.00am - 6.00pm April 10.00am - 7.00pm May 10.00am - 8.00pm June to August 10.00am - 9.00pm September 10.00am - 8.00pm October 10.00am - 7.00pm