Hi bibster - can't help you i'm afraid (not doing this one btw) but keep seeing your posts for these 3 questions (and someone else whose name eludes me at the moment).
I sat down with a map of cornwall the other night and tried to make the clues fit but with no luck.
Being a fellow Cornwall dweller I want to know the answers now, so let me know if you have any success, or if you get the answers after the quiz has closed.