Mysterious chronicle (part 11) is a book found only in Daemonheim. It may appear in front of the dungeon-ending ladder after killing the boss monster.
It was written in the year 1464 of the Fourth Age. Bilrach explains that he is still as sane as the day he started his descent, and that the whispers he hears are a sign that he is getting closer to his goal, though they seem to be guiding him.
The whispers seem to have some level of influence over Bilrach; He denies his insanity. This may be a reference to Edgar Allen Poe's Tell-Tale Heart.
Year 1464 of the 4th Age:
I'm as clear of mind as the day I started this descent. My methods and the nature of this place may seem random, but I've yet to use the more dangerous and unstable side of my power. My sanity is unwavering; hearing whispers from the earth below is not a sign of my mind breaking, it merely confirms I am getting closer and should continue down. Should I be concerned that the whispers try to guide me?Zamorak guide me!