irst, for she wanted
to be in the fun as much as any of the girls. But suddenly there came to
her an idea--a way that she might punish Billie for daring to become so
popular at Three Towers Hall.

Of course, she could not hurt Billie without hurting all the rest of the
girls but--her lips shut tight and her eyes narrowed to slits--goodness
knew they deserved it. It was they who had helped to make Billie so
popular.

The plan she had thought of was very easy. All she had to do was to slip
from dormitory "F" into her own, leaving both doors open a little so
that the light from one could shine into the other.

Then, as she passed Amanda Peabody's cot, just a little jostling to
awaken her and the thing would be as good as done. Amanda, seeing the
light, would be sure to investigate, and, while she was gone, she, Rose,
could undress quickly, put on her gown, and slip into bed. Then when the
discovery came--and Rose knew Amanda well enough to be sure there would
be a discovery--she would be safe in bed and unsuspected. That is,
unless the girls should tell.

She looked over her shoulder at the happy scene in dormitory "F," and
for a minute she felt guilty. Then one of the girls came over and put an
arm about Billie and her lips tightened again.

Of course if the girls knew that she had been the one to give them away,
no one would have anything to do with her. She would probably have to
leave Three Towers Hall.

But how would they know? She could tell them that she had slipped into
dormitory "C" to get a handkerchief--or something else, she could think
that up later--and while she was gone, Amanda had slipped out and given
the alarm. It was all very simple.

She looked back into the room where the fun was in full swing and once
more her heart forsook her. It would be a dreadful thing for the girls.
They would probably be expelled from Three Towers.

But here was her chance, if she was going to do it--and it might be her
only one. One of the girls was giving a whispered and funny recitation,
and the girls were doubled up with laughter, fairly holding on to
themselves to keep from making a noise.

The look in Rose's eyes hardened. She forsook her post

CHAPTER XV

A PLOT FAILS

Caroline Brant had been watching from behind a pair of horn-rimmed
spectacles, although nobody, not even Rose, could have told it.

She had seen Rose glance into the room, had noticed how queerly she had
looked at Billie, and now,