Open your inventory, select the "Blank Note," and use it while standing under the UV light.
Inside the office/storage room, there is a switch on the wall that turns on a purple UV light.
Detailed walkthroughs for these sections are available on GameFAQs and the Penumbra Wiki . Penumbra Overture
Found in the tool shed; needed to release the minecart in Shaft 12.
Once you have the paper, it will appear blank in your inventory until you expose it to . Open your inventory, select the "Blank Note," and
Watch this walkthrough to see the exact location of the blank paper and how to reveal the hidden code under the UV light: Penumbra Overture | The Blank Paper | #10 MrNoDStudios YouTube• Apr 6, 2016 Key Items for This Section
Essential for navigating the dark tunnels of Shaft 13. Notebook: Used to record the code once you've revealed it. Found in the tool shed; needed to release
The paper is hidden inside one of the lockers. How to Reveal the Secret Text