The Letter:
It is too hot, thought Minerva McGonagall, as she sat at her desk. I was mid August, and indeed, it was very hot. She had opened her office window in hopes of catching a nice breeze, but in vain. Minerva was having trouble concentrating on her work. She was just considering taking off her outer robe when a big gray and black owls swooped in through the window and dropped a letter on her desk. The owl then perched itself on a chair in front of Minerva's desk and looked at her pointedly. Minerva looked at the letter and saw that it was addressed to the Headmaster or Headmistress. Minerva sighed. Albus was at the Ministry for some reason or another, and while he was away, she took his mail. The sender obviously needed a reply, so Minerva opened the letter and began to read.
Dear Headmaster/ Headmistress,
My name is Celia Hamelton. I am 16 years old and I have recently moved to England from America. I am Muggle born, and went to the American Academy of Magic. I am hoping that I can transfer to Hogwarts. Please send a reply back with Jemima, my owl.
Thanks!
Celia Hamelton
Minerca eyed the owl who's name was apparently Jemima. A Muggle born American witch. That would be interesting.
Dear Miss Hamelton,
I would like to have an interview with you to see what level you are at in your magical abilities. I will come to your house tomorrow at 3 o'clock and bring you to Hogwarts. ( I must do this because in England, an underage wizard/ witch may not do magic out of school. By bringing you to Hogwarts, you may be permitted to perform magic for my evaluation.)
Sincerely,
Minerva McGonagall
Deputy Headmistress
Minerva attached her letter to the owl and watched as it soured over the Forbidden Forest and out of sight.