The teachers felt the restlessness in the air and strove to keep the girls to their lessons by making them more interesting. But it was of no use. The girls studied because they had to, not, except in a few scattered cases, because they wanted to.

One of the exceptions to the rule was Caroline Brant, a natural student and a serious girl, who had set herself the rather hopeless task of watching over Billie Bradley and keeping her out of scrapes. For Billie, with her love of adventure and excitement, was forever getting into some sort of scrape.

But these days it would have taken half a dozen Caroline Brants to have kept Billie in the traces. Billie was as wild as an unbroken colt, and just as impatient of control. And Laura and Vi were almost as bad.

There was some excuse for the girls. In the first place, the spring term at Three Towers Hall was drawing to a close, and at the end of the spring term came—freedom.

But the thing that set their blood racing was the thought of what was in store for them after they had gained their freedom. Connie Danvers had given the girls an invitation to visit during their vacation her father’s bungalow on Lighthouse Island, a romantic spot off the Maine coast.

The prospect had appealed to the girls even in the dead of winter; but now, with the sweet scent of damp earth and flowering shrubs in the air, they had all they could do to wait at all.

The chums had written to their parents about spending their vacation on the island, and the latter had consented on one condition. And that condition was that the girls should make a good record for themselves at Three Towers Hall. And it is greatly to be feared that it was only this unreasonable—to the girls—condition that kept them at their studies at all.

It was Saturday morning, and Billie, all alone in one of the study halls, was finishing her preparation for Monday’s classes. She always got rid of this task on Saturday morning, so as to have her Saturday afternoon and Sunday free. She had never succeeded in winning Laura and Vi over to her method, so that on their part there was usually a wild scramble to prepare Monday’s lessons on Sunday afternoon.

As Billie, books in hand and a satisfied feeling in her heart, came out of the study room, she very nearly ran into Miss Arbuckle. Miss Arbuckle seemed in a great hurry about something, and the tip of her nose and her eyes were red as though she had been crying.

“Why, what’s the matter?” asked Billie, for Billie was not at all tactful when any one was in trouble. Her impulse was to jump in and help, whether one really wanted her help or not. But everybody that knew Billie forgave her her lack of tact and loved her for the desire to help.