I write this in hopes of reconciliation. As your sister's son, I am honor-bound to try.
Your illness and actions have brought shame to our clan, and worse than shame. I was hunting in the hills when you returned to our village after your many years' away. You know the horrors I found upon my return. You are not fully responsible; your disease drove you to it.
Though many of our clan were dead or turned into feral vampires, the survivors regrouped, founded a new clan-hold, and now thrive in the nearby hills.
I tracked you to the Imperial City but lost your trail here. I bribed a mercenary to find you and hand you this letter. I hope he survived.
Join me. Together we will seek a cure and your crimes will be forgiven. This was your sister's last wish. Return to your people with me.