After more travelling, we came to the house of Agatha the Banshee. We gave her a nice comb and she answered the question we posed. We just had to try to remember (as players) whose magic book we were supposed to ask her about. As it happened, the person who always writes everything down hadn't written that particular bit down.
The GM "helped", saying it was a funny name and it began with "Bow", because apparently, when it had been mentioned in passing many weeks out-of-game previously, the person who heard it had said "it's funny, because it sounds like Bojangle". Let's just say the clue didn't help, because the name wasn't actually funny.
Aaaaanyway. We then came across a wizard in a tent, guarded by zombies. We got rid of the zombies, and instead of sticking around and getting information from the wizard, we got rid of him too. Oh the things we do for XP ...