Larian Studios Forums Beyond Divinity (English) Help/Tips/Tricks Act III--2 Characters Missing

I can't find two characters mentioned in Grimwulf's walkthrough.

1) Sigurd. No one in his house or nearby. I've killed the assassin in the cellar, so the quest appears in my log, but there's no one to report success to.

2) Ranaar Head Librarian. There are three regular librarians in the large room, but no one further in. I can see the Book of Twilight beyond a locked door, but can't find access.

Am I stuck? Or will completing other quests raise my ranking enough for the encounter with Kiya?

Loading a few earlier saves has not produced either of these characters.

Thanks for any advice.