The Count of Castile was, however, too powerful a vassal to continue long on peaceable terms with a sovereign, an alliance with whose family had more than ever smoothed the progressive ascent of his pretensions. Soon after the accession of his son-in-law Don Ordoño, he entered into an alliance against him with the King of Navarre. This declaration of hostility was followed by the divorce of Fernan's daughter by the King, who immediately entered into a second wedlock. The successor of this monarch, Don Sancho, surnamed the Fat, was indebted for a large portion of his misfortunes and vicissitudes to the hostility of the Count of Castile. Don Ordoño, the pretender to his throne, son of Alonzo surnamed the Monk, with the aid of Gonzalez, whose daughter Urraca, the repudiated widow of the former sovereign, he married, took easy possession of the kingdom, driving Don Sancho for shelter to the court of his uncle the then King of Navarre. It is worth mentioning, that King Sancho took the opportunity of his temporary expulsion from his states, to visit the court of Abderahman at Cordova, and consult the Arab physicians, whose reputation for skill in the removal of obesity had extended over all Spain. History relates that the treatment they employed was successful, and that Don Sancho, on reascending his throne, had undergone so complete a reduction as to be destitute of all claims to his previously acquired _sobriquet_. All these events, and the intervals which separated them, fill a considerable space of time; and the establishment of the exact dates would be a very difficult, if not an impossible, undertaking. Various wars were carried on during this time by Gonzalez, and alliances formed and dissolved. Several more or less successful campaigns are recorded against the Moors of Saragoza, and of other neighbouring states. The alliance with Navarre had not been durable. In 959 Don Garcia, King of that country, fought a battle with Fernan Gonzalez, by whom he was taken prisoner, and detained in Burgos thirteen months. The conquest of the independence of Castile is related in the following manner.