Penumbra Overture Here

Open your inventory, select the "Blank Note," and use it while standing under the UV light.

The secret text will reveal the storage password: 1371 . Penumbra Overture

Are you having trouble finding the or navigating the spider tunnels to get to the lockers? Penumbra Overture | The Blank Paper | #10 Open your inventory, select the "Blank Note," and

Found in the tool shed; needed to release the minecart in Shaft 12. Open your inventory

Inside the office/storage room, there is a switch on the wall that turns on a purple UV light.