A World of Girls by L.T. Meade

When Hester reached her bedroom after prayers on that second evening, she was dismayed to find that she no longer could consider the pretty little bedroom her own. It had not only an occupant, but an occupant who had left untidy traces of her presence on the floor, for a stocking lay in one direction and a muddy boot sprawled in another. The newcomer had herself got into bed, where she lay with a quantity of red hair tossed about on the pillow, and a heavy freckled face turned upward, with the eyes shut and the mouth slightly open.

As Hester entered the room, from these parted lips came unmistakable and loud snores. She stood still dismayed.