You are looking for a small container with log book, writing utensil(unless removed so please bring your own), and paper with question for series. You must sign the logbook to claim this cache. Beware of muggles. Please place back carefully and exactly where you found it in a way that it isn't obvious to others.
Logging this cache earns you a smiley, but it also contains a question that would lead to a bonus cache MLSP Bonus Cache (GC4X5NJ), if interested. There are a total of 6 caches, each with a question. GC4X5FY - MLSP #1, GC4X5HF - MLSP #2, GC4X5HT - MLSP #3, GC4X5JC - MLSP #4, GC4X5JT - MLSP #5, GC4X5K9 - MLSP #6 Answer correctly to get the correct coordinates to the bonus cache. You do not have to do the caches in numerical order, however they are placed in a loop fashion.
N 40 2 A.B C 3 W 076 3 D. E F 8