Oh, dadgum I didn't sign as I had my hands full and far too many people around! I've messaged the owner, even if it should have been there it was far too visible as it caught my eye and I wasn't even geocaching! I've let them know what I did with it Sorry, this is all still knew to me, I've just realised now you've mentioned a puzzle one that I read recently which isn't too far. I don't usually use this site, I have an app on my android phone.
I was trying to be helpful, hope I've not done anything wrong! Still, I might head back in a few days and sign if still there!