take a look at them. 'Hilda Browne--Netta Goodwin.' 'Netta
Goodwin--Gwen Gascoyne.' 'Betty Brierley--Netta Goodwin.' 'Charlotte
Perry--Netta Goodwin.' All in such different styles of writing, too! I
believe I begin to see daylight. Now, shall I go and call Miss Douglas
at once to look at this? No--it's incriminating, but not sufficient
evidence to convict. I must let things develop a little further first.
I think I'd better have a witness, too. Miss Netta Goodwin, I believe
you're going to be rather too clever for once, and that you'll find
yourself outwitted by one of the despised Juniors."

Ida Bridge was late for dinner that day, but she took Miss Roscoe's
reproof with a sangfroid at which her Form marvelled.

"I don't care if I have to write fifty lines as a punishment," she
murmured to her neighbour and chum, Peggy Weston. "What I've just
discovered is worth a thousand lines. I can't explain why now, but the
moment dinner is over you and I must stalk Netta Goodwin, and, without
letting her know it, never take our eyes off her till afternoon school
begins."

Quite unconscious that two small spies had resolved to keep her
movements under surveillance, Netta slipped away from her friends
after dinner, and returned to the classroom. It did not take her long
to finish her task; she had soon fastened her nineteen envelopes,
then, concealing them in an exercise-book cover, she hurried
downstairs. Miss Roscoe's study was still empty, and nobody seemed
about, for Netta never noticed the cautious pair who were dodging and
watching in her rear as cleverly as a couple of young detectives.
After a hasty glance round the room she advanced to the Principal's
desk, and deeming herself quite unobserved, rapidly exchanged the pile
of envelopes there for those which she had brought with her. She gave
one look of satisfaction at the substituted set--they were such an
excellent imitation--and bore off the genuine ballot to the Fifth Form
room. Ida and Peggie, with breathless interest, followed, and saw her
putting the stolen goods into her desk; then, having witnessed as
much as they considered necessary, they flew in hot haste to lodge the
information with their own Form mistress. Miss Broughton, amazed at
what they told her, sought Miss Roscoe, who summoned Ida and Peggie,
and listened attentively to their story.

"This must be enquired into promptly," she declared. "Come with me at
once to the Fifth Form."

The girls had jus