It was part of the goodbye tour.
Louisa wasn't usually a sentimental girl who liked to express her feelings at any given chance. She grew up to know that in order not to get hurt or be an easy victim for people is to be cautious in public and tread lightly. This was something she urged herself to go by but truly, she did feel a jumble of feelings as the days raced toward the end of her last term, and she found herself looking at every corner of every spot in Hogwarts differently but with affection.
It was a very nice weather today, and Adam's previous encouraging words of seizing the chance of nice weather and take the study outside. So she had a satchel hanging across her figure filled with books while she walked toward the pathways and took everything in.