Luckily, she has no knowledge of it because it's never happened. Merrill steadfastly refuses to fuel her magic with the blood of an innocent, and would only use someone else's blood if they insisted. Besides that, Kirkwall was five years ago; she's grown more careful since then.

"I've got a terrible sense of direction. Well, at least in places Dalish don't usually go." In other words, anywhere that isn't... basically the middle of nowhere. "But yes, that sounds good!" Books are quickly gathered and Barkley is encouraged away from the sunbeam he's found illuminating dust bunnies, and away Merrill goes.