Gahhhhh! It's on the tip of my tongue, but too tired and too much useless junk in the way; if I say what I want to say (which is a geographic place name on modern Earth, not too far from where the Professor spent much of his life, I believe) it would be a dead give away. Was something like the Pool of Azunalbizar, I think, but I know that's not (quite) it, sigh.
Edit: OK, I feel better now; a miss is as good as a mile, but missing by a mile hurts less. Carry on.