Thanks so much for your reply. I've been to Lochport repeatedly and have found no exits to other areas. I'll go once more but I've been there numerous time, looking. I went into the underground area (I forget the name and got--I think it was a key, for another quest, which I don't have. Ah, what I DIDN'T do was to look back before I left that area. Zombies had spawned....another area! I then found the waypoint.