Being invisabile it is impossible to know exactly where she is, so turning invisable yourself you hear a gasp of shock and the giggle of excitement, followed by a murmering.
"Aww, it's no fun when you get to turn invisable too!" the female voice shouts, sounding like a spoilt child. "Are you enjoying my little creations? The whole house is full of them and all because of dear Rolthy giving me some of his scrolls. The festering corpses all look so wonderful, don't they?"
The voice sounds like it's coming from the west of the room, close to the blinded zombie.