The way lay across a sandy plain, and the day being intensely hot, the Traveler called upon the driver to stop for rest. To escape from the direct heat of the sun, which was shining in all its strength, the Traveler proceeded to sit down in the shadow of the Mule.

But a violent dispute arose, for the shadow was sufficient for but one, and the driver, a lusty fellow, rudely pushed the Traveler one side, claiming the spot for himself, saying: "When you hired this Mule of me, you said nothing about the shadow. If now you want that too, you must pay for it.

The discussion grew so violent that they forgot the Mule, who took advantage of his freedom and ran away. And so, in disputing about the shadow they lost the substance.