"My dear staff and students,

There is an old saying that Aurors never retire. They simply fight to the death and then stand guard over heaven. The last few years have been a reprieve from my time as an Auror, a chance to rest after the greatest tragedy of my life and a chance to refocus my energy for the greatest cause I could pick up... all of you.

But at the end of the day, I have been fooling myself. Hogwarts is safe. You are safe. It is the world outside of Hogwarts that is fraught with danger, and now that I have made this place safe for you, I must turn to the greater world in my battle against the Dark.

There is a new menace, in a place far from here, and they have asked a select few to come and fight. Professor Lainey and I are leading the team. It was the easiest decision of my life to come work at Hogwarts, and it is the hardest of my life to leave. I have loved my time here and the healing it has brought me, and I carry each of you in my heart. For truly, I am fighting on your behalf.

So I must bid you good bye, not just for the summer, but for longer. I cannot say how long this menace lasts, nor if it will be the last. I can only say that you are the true treasures of Hogwarts and..."

She couldn't finish the letter, so she stuffed the piece of paper back in her pocket and wiped her streaming eyes. Now this was certainly unprofessional, but she couldn't bring herself to care.