The notebook isn't one she would dare to bring to school; one of her teachers might tell her mother about it, and then Mother would fuss.
She doesn't recognize it. It's probably a present from Sarah or Jaromira. Or maybe Kanimir, actually; she wouldn't necessarily expect him to think to get her a pretty diary, but it's been left out on the desk in her room, and she would expect one of her sisters to think to at least tuck it out of sight in a drawer.
It's such a pretty diary.
She pulls out her desk drawer far enough to access the false bottom, and pulls out her nice fountain pen. In her still somewhat amateurish calligraphy, she writes:
Dear Diary,