It was a pleasant mid-July eve, and you were taking a walk through a pleasant costal wood (perhaps a few too many goblins in the area)...
All of a sudden you spotted something glinting between two trees... Your heart raced, thinking you had found a very precious earring... Instead you found a pile of bone chips... but then, you suddenly realised, underneath the bone chips there was a mask cut from finest Sarnak hide!
For a moment you wondered if perhaps this stash had been cached away for a particular person to find, but then you decided, no, this was just the gods smiling on you.
Longstory short, lets just say Goatnapper, I know what you did last summer...