Why would this involve Quimley? There are lots of things living down there. I assume the Generous Ones will know what to do about this creature. Send it to the Lands Beyond or something. And anyway, it seems to only be after Alexandra. It didn't attack anyone else in all the months it was tracking her. Well, except for Larry at the end, but that's because he was with her. There is no reason to think the creature would go on a random killing spree once it gets to the Lands Below. Maybe it's from there originally anyway and will just go back to its tribe.