My Dearest Lily,
I deeply apologize for not keeping in contact with you for not apologizing enough, for letting you marry that idiot Potter. I am extremely heartbroken over the fact that you had a child with him. And that said child was born at the end of July. I am ashamed of myself for being a death eater. I am ashamed that I was spying on Dumbledore and hearing part of the prophecy that ended up killing you. I cannot stand this anymore. You had your whole life ahead of you and I ruined it. I cannot stand the fact that I worked for him. I came to Albus for help when he targeted you. I begged the Dark Lord to spare your life.
My lovely Lily, why did you have to be so brave, why were you so selfless. When I heard that the rat betrayed you, I knew you were done for. I tried to come and save you. I was late. So late. By the time I had reached where you were hiding, all that remained were the ruins and your bodies. I couldn't find the boy. I only found your corpse. Even in death you were beautiful. I cried. I couldn't help it. I had sunken so low in life. I held your body and cried. The only tears I shall ever admit to shedding are the ones I shed over you. Dumbledore offered me a position teaching at Hogwarts. He said it was to apply normalcy to my life. I know that what he really wants to do though is keep an eye on me. And when your son comes to the school, I shall watch over him.
He told me he had your eyes. I don't know what to do. Imagine in eleven years, a boy who shall look exactly like James Potter with your eyes will sit in my class. I would never be able to look him in the eyes and act like all was well. That's what HE keeps saying. All was well. All was not well; I have lost the one person I cared for the most. I am so sorry Lily. I am sorry for not trying hard enough to stay away from the Dark Arts. I am sorry that I never tried hard enough to rekindle our friend ship. I am deeply sorry that I called you a… I cannot even say it anymore. When I die, this letter shall be sent to your son. I shall also hope that there would be enough time for me to compile my fondest memories of you, so he would know how wonderful you are. I shall stay strong for you, to protect your son. I love you Lily.
All my love,
Severus Snape