Bring this note to me, and I'll give you something. Anything. It might be trivial or it might be large, it depends how generous I feel at that time!
I live in 170 Petrif Willow, and am often found running around in the Ancestral Grounds, or mining in the Illimenski Caverns. Find me, gimme the note, and I'll give you stuff... see you soon!
P.S: I have left 12 other notes like this one around the world... see if you can find all 13!