A year before the battle of Hogwarts~
Dear Lily,
You must hate me so much right now. And I understand too, because when I look at myself the coldness and bitterness in my heart shocks me. But please, you have to know, that I have done everything for a reason. Those reasons might be wrong or right, but they were reasons all the same. Lily, I have a confession to make. Avada Kedavra is a curse I absolutely hate to use, yet I had to do it. I killed Albus Dumbledore last night. He begged me to do it, it was his own will.
The Dark Lord had to believe that I was on the Dark side. And the only way to secure his trust was to kill his most feared enemy. Dumbledore. This is my last act of revenge for your death, Lily. For now your son is safe.
I know, that in another year or two to come, the Dark Lord will find out my true identity. The time I spend alive lessens with every passing day. Time flies by so fast, Lily. How must have you felt when you were hiding from Him for so many years? I understand you completely now. It pains me to talk to Him face to face, and it pains me to meet His eyes.
My time here is almost up, and that is why I must leave this quill and parchment. I will meet you soon, Lily but when that time comes I ask for only one thing from you …. your forgiveness, I will ask for nothing more. In the meanwhile I also promise you that from this moment on, I will do all I can to protect your son until the day I leave. He has your eyes Lily, he has your eyes…
I love you Lily, always have, and always will,
Love,
Severus.