That answer gave the nobles pause. It led them to perceive that a change had taken place, and that the lawless days of Henry IV were at an end. To have made them realize this was something. But there was more to be done before they would understand that they must submit to the altered conditions, and Isabella pursued the policy she had adopted with an unswerving directness, as the following story from Pulgar’s Chronicle bears witness: A quarrel had broken out in the Queen’s palace at Valladolid between Don Fadrique Enriquez (son of the Admiral of Castile) and Don Ramiro de Guzman. Knowledge of it reached the Queen, and she ordered both disputants to hold themselves under arrest in their own quarters until she should provide that judgment be given between them by the Courts. Fadrique, however, signified his contempt of the royal mandate by disobeying it and continuing at large. Learning this, Isabella gave the more obedient Guzman his liberty, and the assurance of her word that he should suffer no harm. A few days later he was riding peacefully through the street, secure in the Queen’s safe-conduct, when he was set upon by three masked horsemen of the household of Fadrique and severely beaten. No sooner did the Queen hear of this further affront to her authority than she got to horse, and rode through torrential rain from Valladolid to the Admiral’s castle at Simancas. In fact, in such haste did she set out that she rode alone, without waiting for an escort. This, however, followed presently, but did not come up with her save under the very walls of the Admiral’s fortress. She summoned the Admiral, and commanded him to deliver up his rebellious son to her justice, and when Don Alonso Enriquez protested that his son was not there, she bade her followers search the castle from battlements to dungeons. The search, however, proved fruitless, and Isabella returned empty-handed and indignant to Valladolid. Arrived there, she took to her bed, and to those who came to seek news of her health, she replied: “My body aches with the blows delivered yesterday against my safe-conduct by Don Fadrique.” The Admiral, trembling before the royal wrath, resolved to deliver up his son and cast him upon the mercy of the Queen. So the Constable of Castile--Fadrique’s uncle--undertook the office of intercessor. He went with Don Fadrique to Valladolid, and imploring Isabella to consider that the young man was but in his twentieth year and that he had sinned through the rashness of youth, begged her to do upon him the justice she might wish or the mercy that was due. The Queen, however, was not to be moved to mercy for offences that set her royal authority in contempt. She was inexorable. She refused to see the offender, and submitted him to the indignity of being taken to prison through the streets of the city by an alcalde. After a spell of confinement there she banished him to Sicily, prohibiting his return to Spain under pain of severest punishment.