Vampyr Burn After Reading is one of the many side quests that you can complete in the action role-playing game. It's one of numerous Pembroke Hospital Investigations, which can be tricky if you're not a high enough level.
Vampyr Burn After Reading Task
“Choose what to do with Mortimer Goswick's letter. Bring back the letter to Mortimer Goswick. Give the letter to Mortimer Goswick's Mother.”
You'll first encounter this quest once you've eavesdropped on the chat between Mortimer and Beatrice Goswick. Have a chat with Mortimer about suicide and the Burn After Reading investigation will be unlocked.
As soon as you get given the key by the boy to Goswicks' flat, head to the marker on your map. You'll need to tackle a few enemies that are up to level 13, so we recommend you follow our Vampyr Best Skills guide.
Once you get to the building, you can use your warp ability to access the flat. Here you'll find one of the games many collectibles on the desk - The Origins of Vampires: Fertile is the Belly of the Beast.
You'll also unlock a hideout where you'll find the letter that you need. It's up to you to now make a decision on who should receive the note. There's no right or wrong answer, but your choices in Vampyr can affect the narrative.