@BoggyB: Your map is wrong. So far from the entrance they've gone W, N, W, N, and they're now going W again.

We traveled West and ended up reaching a door leading South. The hall continued Westward.
Uberbob leaned towards me and whispered, "Pretty sneaky, sis."
"Huhwhat?" I stammered.
"I dunno, it's just been a long time since I delivered a one-liner. Carry on."