Silently erase the picture, or better still, pay no attention to it, if
it is not a serious disturbance to school work. At all events make no
public attempt to find out the artist. Many teachers would refuse to
question one who did a given wrong, as it is almost certain to lead to
complications. If your hold on the school is strong, laugh off the
matter and say:
“I know where to find a good salary for a competent cartoonist. If any
of you are interested, let me know.”