Found in the tool shed; needed to release the minecart in Shaft 12.
The paper is hidden inside one of the lockers. How to Reveal the Secret Text Penumbra Overture
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 Found in the tool shed; needed to release
Detailed walkthroughs for these sections are available on GameFAQs and the Penumbra Wiki . Found in the tool shed