She gave a low growl when Mana named Thorns.  "Infernal blights lay upon that city that should have never been," she said, her voice actually rather harsh as she said it.  She shook herself though.  "Well.  Unfortunately, as I've already said, until I can be sure you won't say anything, I'm still going to have to keep you here.  But if you'd like, I can send someone to look into it, if you don't mind telling me what precisely it was that you were looking for?  I swear, on my honor, that I will never reveal a word of it save to those as I trust to look into the matter discretely for me, should you like?"