[Cu's expression changes as he reads the text. Someone living in the walls is definitely a step further than the old forts and castles he'd lived in. It reminds him a bit of dealing with Assassins and their presence concealment, but with an even more unsettling feeling.]

...You'd never seen 'em and they still knew you? Seems like someone was after you or just obsessed with you. Pretty weird. [He's curious, though...] What kind of stuff did they leave behind? Writings and things, I'm guessing?