Tough Letter is an undelivered letter addressed to Nine-Fingers from a former associate.
Where to find
I won't come back to the city, not while you have your thugs looking for me. If you want the debt paid, you'll have to trust me and collect it yourself. Go to the graveyard and look for where a 'M Kurwin' is buried. Get digging and you'll find enough valuables to settle matters between us.
Don't go looking for me. I'll know when I'm safe.