Red Rose and Tiger Lily by L.T. Meade

Hester Thornton and Annie Forest had been educated at the same school -- the well-known Lavender House. The fame of this school, the noble character of its mistress, the excellent training which each girl who went there received, formed a recommendation for each young student in after life. Hester and Annie had gone through severe storms in these early days. Their friendship had been cemented under the influence of great trouble. It was exactly a year now since Hester had been suddenly sent for from her busy and happy school life to take care of her father through a dangerous illness. He found her company so sweet, her skill and tact in managing his house so great, that he resolved not to allow her to go back to school again. Annie Forest was now, therefore, the head girl at Lavender House. She was Mrs. Willis's right hand; her help and support in every way. Annie was as great a favourite as of old, and as love and kindness had developed all the best side of her character, she was no longer the tomboy of the school, nor the one who was invariably the ringleader when mischief was afloat. She was still impulsive, however -- eager, impatient -- for such a nature as hers must fight on to the end of the chapter. She did not possess Hester Thornton's steady principles, and would always be influenced, whether for good or evil, by her companions. She was only to spend one more term at school; the future, after that, was practically unknown to her.

"I wish you'd tell me about Nan," said Hester, on the first evening of Annie's visit to the Grange. "I don't know why, but I feel a little anxious about her."