I met some time ago with an account of a clever donkey which was
employed in drawing a baker's cart. He was so well acquainted with the
houses of all his master's customers, that while the baker went into one
to deliver his loaves, the sagacious ass would proceed to the door of
the next, at which, when he could reach the knocker, he gave a
rap-a-tap-tap. If unable to do so, he would stamp with his feet in a
peculiar way, well-known to the inmates. He never failed to stop at
their doors, nor was he ever known by mistake to go to the wrong house.
Be as careful to learn your school lessons now, and as exact in business
matters when you grow up, as was the baker's donkey to attend to what he
conceived his duty.