Perjour

Perjour was a servant in the service of Zaros, first mentioned in the Lore Twice Burnt. He was bound to a book that magically wrote everything he saw, heard and thought, which Zaros would read after every mission he sent Perjour to witness.

Zamorak cast a spell on Perjour and his book while they were watching the dancer Char perform. This spell altered the one Zaros had placed on Perjour, duplicating the book into Zamorak's possession and altering the one in Perjour's possession, the one Zaros would see, so that it no longer told the whole truth.