So I waited until I saw what the young man's line of defense might be.

Here is an envelope in which one of the copies was received by the captain of a rival football team.

You will note that the sender, while understanding something about the use of a type machine, was plainly a novice in directing an envelope on the typewriter.
So he addressed this envelope in handwriting.

Here is the envelope in question, and here is one of Mr.Drayne's school examination papers, also in his own handwriting.

I will ask the members of the Board to examine both." There was silence, while the copies passed from hand to hand, Drayne losing color at this point.
"Be brassy!" he whispered to himself.