ppose
it was designed. He did not appear to notice it, but remained after
school until the scholars had all gone, and then made a thorough
examination. He found, at length, a broken place in the plastering,
where a _lath_ was loose, and a string was tied to the end of it, and
thence carried along the wall, under the benches, to the seat of a
mischievous boy, and fastened to a nail. By pulling the string he could
spring the lath, and then let it snap back to its place. He left every
thing as it was, and the next day, while engaged in a lesson, he heard
the noise again.

He rose from his seat.

The scholars all looked up from their books.

"Did you hear that noise?" said he.

"Yes, sir."

"Do you know what it is?"

"No, sir."

"Very well; I only wished to call your attention to it. I may perhaps
speak of it again by-and-by."

He then resumed his exercise as if nothing had happened. The guilty boy
was agitated and confused, and was utterly at a loss to know what to do.
What could the teacher mean? Had he discovered the trick? and, if so,
what was he going to do?

He grew more and more uneasy, and resolved that, at all events, it was
best for him to retreat. Accordingly, at the next recess, as the teacher
had anticipated, he went slyly to the lath, cut the string, then
returned to his seat, and drew the line in, rolled it up, and put it in
his pocket. The teacher, who was secretly watching him, observed the
whole manoeuvre.

At the close of the school, when the books were laid aside, and all was
silence, he treated the affair thus:

"Do you remember the noise to which I called your attention early this
afternoon"?"

"Yes, sir."

"I will explain it to you now. One of the boys tied a string to a loose
lath in the side of the room, and then, having the end of it at his
seat, he was pulling it to make a noise to disturb us."

The scholars all looked astonished, and then began to turn round toward
one another to see who the offender could be. The culprit began to
tremble.

"He did it several times yesterday, and would have gone on doing it had
I not spoken about it to-day. Do you think this was wrong or not?"

"Yes, sir;" "Wrong;" "Wrong," are the replies.

"What harm does it do?"

"It interrupts the school."

"Yes. Is there any other harm?"

The boys hesitate.

"It gives me trouble and pain. Should you not suppose it would?"

"Yes, sir."

"Have I ever treated any boy or girl in this school unju