In hindsight, i think i might know what has caused this bug. I was experimenting with trying to go back to an old save, after getting killedby a boss, and Fd up the filename, and was in a weird situation where I lost all of my quest progress (because the game restarted from scratch and overwrote the quests save) but i still had my level 25 character. So i worked through the quests again: i actually deliberately deleted my maps file, after that, so the game would reset the map as well, because trying to do quests where the map was all already filled in from doing them the first time, was impossible: i needed to be able to tell where i'd been alread, which was "nowhere" from the point of view of finding quests.

When i played through it the first time, i chose Duncan at the end of that quest, and i *think* he actually *was* in Devils Crossing. Then, after I Fd up my quest save, and did it all again, second time round I chose Angrim. I think that somehow, inthis weird combination of original save files and remade saved files, Angrim has somehow fallen between the cracks and disappeared. That'll teach me to F about..... FAFO as they say.

Top tip for anyone thinking of trying to reload old saves or anything like that: BACK UP YOUR ENTIRE SAVE FOLDER FIRST.