Postmans Knock is a type off illness.........Raw knuckles and swollen knee joints are good indicators of Postmans knock. It should be treated with a pint of ice cold Guiness and a meat pie therapy.........
The saying "Where there's muck there's brass", is total bollox. I've been upto my armpits in various types of tish for the last week or so (mostly human !!!) and I'm still skint!!