Then I have a problem. I rechecked upstairs on the surface where the guard died. There was only a small amount of gold where he died. In the prison I have killed everything and moved anything that will let me including rotten food, boxes,packages, straw, etc. I have a few keys currently in my possession but none seem to unlock the door. I hold alt down through out the prison and no key shows up. On the plus side exploring the surface has raised me 3 levels.