[s]Seraph[/s] Parker: 
Great post, I can't wait to see what kind of favour Lilith asks, and whether it'll end in our characters bleeding to death again or not. I approve of your use of Seth, you've kept an eye on how he speaks and acts, so I can barely do anything to improve upon his actions as you described them, good work. 
About how he sees it... I would imagine that Seth has seen "real" magic before, as practised by mages and wizards. Witchcraft, at least in my mind, has always been a bit more of the common man's magic, which I think Urisk portraits very well. I'd think that if Seth has seen witchcraft, it must've been only once or twice. Just enough to know that it is a lot of rituals and chanting, but not enough to really know what is going on. However, you did plant a seed of doubt with the line about an inner darkness, so there will be questions I believe. 
Also, the ritual is fine.

Megarandom:
If you moved your character closer and made him somewhat well-known it would give us a reason to bring the knocked-out Susanna to see you. 

Laue: 
Well, you're reading about the history of your family, why not make up an ancestor and have him or her do something? It'll give you time to figure out the next step with your main character.