Now it happened, on a night, that the blacksmith was wakened out of his sleep by a great pounding at the door of his house; and when he got up and went to his door he found standing there two blacks--they were men whom he never had laid eyes on--and with them was a she mule that they had brought to be shod. The blacks made their excuses to him politely for waking him at that bad hour: telling him that the mule belonged to his compadre, and had been sent to him to be shod in the night and in a hurry because his compadre of a sudden had occasion to go upon a journey, and that he must start upon his journey very early on the morning of the following day. Then the blacksmith, looking closely at the mule, saw that she really was the mule of his compadre; and so, for friendship's sake, he shod her without more words. The blacks led the mule away when the shoeing was finished; and, as they went off into the night with her, they fell to beating her so cruelly with heavy sticks that the blacksmith talked to them with great severity. But the blacks kept on beating the mule, and even after they were lost in the darkness the blacksmith continued to hear the sound of their blows.
In some ways this whole matter seemed so strange to the blacksmith that he wanted to know more about it. Therefore he got up very early in the morning and went to his compadre's house: meaning to ask him what was the occasion of this journey that had to be taken in such a hurry, and who those strange blacks were who so cruelly had beaten his meritorious mule. But when he was come to the house he had to wait a while before the door was opened; and when at last it did open, there was his compadre half asleep--and his compadre said that he was not going on any journey, and that most certainly he had not sent his mule to be shod. And then, as he got wider awake, he began to laugh at the blacksmith because of the trick that had been put upon him; and that the woman might share in the joke of it--they all were great friends together--he knocked at the door of her room and called to her. But the woman did not answer back to him; and when he knocked louder and louder she still gave no sign.
Then he, and the blacksmith too, became anxious about the woman; and together they opened the door and went into the room. And what they saw when they were come into the room, Señor, was the most terrible sight that ever was seen in this world! For there, lying upon her bed, was that unhappy woman looking all distraught and agonized; and nailed fast to the feet and to the hands of her were the very same iron shoes that the blacksmith--who well knew his own forge-work--had nailed fast to the hoofs of the mule! Moreover, upon her body were the welts and the bruises left there when the blacks had beaten the mule with their cruel blows. And the woman, Señor, was as dead as she possibly could be. So they knew that what had happened was a divine punishment, and that the blacks were two devils who had changed the woman into a mule and so had taken her to be shod.