>>3's suggestion is good, but none of the files have any info about the owner.
I waited there for a few hours too, but no-one came looking for it.

But you guys are probably right. I've been the victim of an asshole thief too, I left a pouch with drawings in it for 15 minutes at a sleepy grocery store once and 2 old people came along and just took it! Picked it right up! So I'll try to find the owner of this stick, or turn it in.