The lost set of notes is a set of three notes the player can find while exploring.

What could they want? There's nothing of interest in this cave: why would bandits try to set up camp in here?
Anyway, their leader, this Ragon fellow, kept glancing at me with this faint smile. I dare not imagine what he has in mind if I don't clear out of here before tomorrow.
Also, the way he kept stroking my shoulder while talking to me... Gives me the shudders! Yet I can't let a handful of bandits impose their own law on me! When they show up again, I'll have a few surprises in store for them.