Obviously. [And for a few seconds, Sabriel's voice shifts from 'deadly serious' to 'petulant teenager'.] I am a mage, after all.

No, I tried to research it on my own, although most of what I found was just... folklore. Running water and sunlight make sense, those work on the Dead from my world. Decapitation and wooden stakes... make less sense, but multiple sources seemed to think they worked.