Find the laboratory of the Brother of St Paul's Stole
The entry is located in Stonebridge Sewers, just near where you find the #3 Text in Braille, with the code you can open the locked door now. The laboratory itself is right next to the nearby hideout.
Give or not would make no final difference, but to let Mason Swanborough know what the world looks like, may help him understand the true state of the place.