"Nasty, filthy stuff!" declared the indignant sufferers, who, with a remembrance of Miss Birks's treatment of the measles patients, had fondly expected to be coddled and cosseted, regaled on soda-water and lemonade, and forbidden to overexert themselves.

"Serve you right!" chuckled their friends. "It's your own faults, for you couldn't expect Miss Birks to believe in your whines when you look in such absolutely rude health, and compass your meals so creditably. Why didn't you refuse all solid food?"

"Oh no, thank you!"

"And declare cocoa made you shudder?"

"That's beyond a joke."

"If anybody looks ill in this house," continued Annie, "it's Mademoiselle. She's pale and thin, if you like, and eats next to nothing, but she doesn't make any fuss about it."

Noticeably Mademoiselle's increased work and anxiety on behalf of her pupils' success had a bad effect on her health. She looked worn and overdone, and there were dark circles round her tired eyes. Though she did not complain, she confessed to being troubled with sleeplessness. Night after night she lay awake till daybreak, and was sometimes only dropping into a doze when the getting-up bell clanged in the passage. "Nuits blanches may be all very well in music, but they are not pleasant when one experiences them," she confided to Miss Harding. "When I stay waiting for sleep, I hear many curious sounds. Yes—such as one does not hear during the daylight."

"A house is always full of creaks and groans if one stays awake at night," returned Miss Harding. "You mustn't mind them."

"During the day I smile at them," continued Mademoiselle, "but if I keep vigil I am nervous. Yes, to-night I shall be very nervous, for Miss Birks will be away. I like not that she be away."

It was very seldom that the Principal gave herself a holiday during the term, but for once she was going to London to attend an important educational meeting, and would spend the night in town. She started by an early train, leaving her small kingdom in perfect order, and confident that for so short a space of time nothing could possibly go wrong. Certainly nothing ought to have gone wrong; her arrangements were excellent, and Miss Harding was thoroughly capable of acting deputy during her absence. Yet there is an old proverb that "while the cat's away the mice will play", and the mere fact that she was not on the spot made a difference in the school. The girls did not give any trouble, but there was a feeling of relaxed discipline in the air.