A message from Professor Wally McWallop
Ah, so you have made it this far and you wish to find my secret stash, do you? Well I don't want to make it easy for you. After all, I detest all things about geocaching and that's why I've horded so many swappables in my own secret stash that's all mine. Mine I tell you! Muahahaha...
Well, if you must try to find it, I presume you've followed the trail of clues I've left around the place? Starting with Library Trail 1 in Hillsborough (GC8KAZ1), continuing on to Library Trail 2 at Walkley (GC8KBPW) and finally ending up at Library Trail 3 at Upperthorpe (GC8KBQ0). Have you found all the clues and all the caches? You'd better have done, for you'll need information from all three clues and all three caches to find my stash.
Well then, you can find my stash here:
N53 24.UVW, W001 28.XYZ
Not the letters you were expecting, eh? Muahahaha...
If you've found all the final caches from my trail, you'll have numbers for A, B, C, D, E and F. But finding my stash isn't that easy you know! You'll need to think about the clues I left and work out what six digit number needs to be added to ABCDEF to make UVWXYZ.
Do you follow me, geocaching chum? Though this be madness, yet there is method in’t!
Muahahaha...
You can validate your puzzle solution with certitude.