This is the Bonus for the Killingworth Lakeside Park Adventure Lab Cache. This cache is NOT at the published co ordinates and if you choose to go there you will get very wet and look silly. If you havent completed the adventure lab stages you wont have the final numbers in your journal to work out where the final cache is.
Use the Numbers given from the 5 stages to give letters A-F to complete the co ordinates for this bonus cache. Please be discreet when finding and returning this cache.
N55 02.ABC
W001 34.DEF