This section of the book is from the "Stories of Animal Sagacity" book, by William Henry Giles Kingston.
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.