Witcher,
Since you are reading this letter, you have finally guessed who the murderer was. Only after finding my subtle hints, undoubtedly, but still. I congratulate you - and at the same time inform you that you will never have the pleasure of meeting me again.
I long deluded myself into thinking I could wake the citizens of Novigrad from their slumber, make them aware of their corruption and point them on the right path - that which leads to the Eternal Fire and the cleansing it provides.
Yet even though - as you well know - I stopped at nothing in my efforts, it appears they will not bring about the desired results. Novigrad's moral pox has spread too far and too deep - it is now incurable and fatal. Though many consider me a fanatic, even I realize further shock therapy of the kind I have been administering will do no good.
I will thus depart for another, smaller settlement, where the process of moral decay has just begun and where my intervention may yet stand a chance of stopping it. Forgive me for not giving you the details of my itinerary, but I fear you would try to hinder my mission.
My regards,
Hubert Rejk, alias Concerned Citizen