While the name is not officially recognised in-game, the information contained on this page is based on official sources.
The letter to Surok Magis, written in VPSG code.
VPSG code is a coded language consisting of 26 letters, each of which is equivalent to a letter of the Latin alphabet. Described as a "strange language" by the player character, it is in fact heavily warped letters of the alphabet. It appears to be used exclusively by the Varrock Palace Secret Guard (VPSG), though it appears those outside of the organisation can decipher it, such as Surok Magis.