Oh, so you mean to say that all those people up on the surface are trespassing? So why stay down here, then? How are they supposed to know that there's a problem if they don't know ye even exist?

[Because there doesn't seem to be much mention of anyone like these creatures up top except as wild rumours. His eyes narrow thoughtfully, as something occurs to him]

Or is it they did know and drove ye down here at one point?