We happened to be talking last night, you know, about home, and I just mentioned what you had told me, never thinking the fellow would be such a cad as to let it out." You are so much taken aback at the impudence of the fellow, that you let him walk away without another word.

If you have derived no other advantage from your first day at school, you have at least learned to know the character of Jerry.

And you find it out better as you go on.
If you quarrel with him, and threaten him with condign punishment, he will report you to the doctor, and you'll get an imposition.

If you sit up beyond hours reading, he'll contrive to let the monitors know, and your book will be confiscated; if you happen to be "spinning a yarn" with a chum in your study, you will generally find, if you open the door suddenly, that he is not very far from the keyhole; if you get up a party to partake of a smuggled supper in the dormitory, he will conduct a master to the scene, and get you into a row.

There's no secret so deadly he won't get hold of; nothing you want kept quiet that he won't spread all round the school.