Hidden Messages of the Nilfgaardian Kind is a secondary quest in The Witcher 3: Wild Hunt available in the city of Novigrad. To start the quest you need to walk down a street in the Bits section of Novigrad after completing the Never Trust Children side quest as well as re-entering the city. There are some hostile henchmen nearby behind a low wall. Geralt will exclaim seemingly out of nowhere when he sees someone place a note behind a brick in the wall near him. Using witcher vision, you can see a red brick nearby. Looting this brick starts the quest. The red brick can be found next to an arch 2 o'clock from the Kingfisher Inn. The note found there will lead you to another brick in an arch pathway near the Crippled Kate's with another note and a key. It will finally lead you to a treasure chest in the sewers of Gildorf in the north of Novigrad where some loot and another note mentioning how the Trade Corporation has broken off negotiations with Nilfgaard can be found.</p>
- "During his travels through Novigrad the witcher witnessed an extraordinary event. Right before his eyes a mysterious man put something in a hidden dropbox located in the wall of a building. Geralt looked into the box and found a note which directed him to the next location where secret notes were left."
After finding the last cache, the following is added to the quest information: