This incident not unnaturally brought about a quarrel between Leovigild and his son. Ermenigild was then ruling in Seville, while Leovigild maintained his court at Toledo. The trouble grew when Leander, the uncle of Ermenigild, persuaded the young man to forsake Arianism. His father was deeply angered, and vowed that the Gothic crown should never come to an apostate. The Archbishop of Tours states that the father was the first to take up arms after the rupture, but other historians suppose that the turbulent Ermenigild began the hostilities. This domestic difference led to serious warfare. Ermenigild was besieged in Seville by his father's forces, after begging aid from Mir, King of the Suevi, in Galicia. Mir started with an army to assist the rebellious prince, but on the way he was defeated by Leovigild, and forced to aid the monarch. For a year Ermenigild resisted the siege of Seville. The people were on the point of starvation when he resolved upon capitulation. Nothing remained but flight, and the prince made his escape from the city and reached Córdova. There he was captured, divested of his regal garments and authority, and banished to Valencia. Very soon the strife was renewed. Ermenigild, panting for a reprisal, solicited aid from the Greeks and rebels of the east coast, and invaded Estremadura. His father went to meet him with a force of his bravest men. The attack was made by Leovigild, who drove his son's army from Merida into Valencia, and took the young man a prisoner. The King was stern, but he could not act ungenerously towards his foe and son. He offered Ermenigild pardon and favour on condition that he would reject his heretical faith. The rebel refused the terms; he would rather remain in his dungeon than practise hypocrisy. Again the father besought the son, through an Arian priest, to renounce his false doctrine, and again Ermenigild was resolute. In a passion, he cursed the cleric, crying: 'As the minister of the devil, thou canst only guide to hell! Begone, wretch, to the punishments which are prepared for thee!' This was more than Leovigild could bear. He immediately sentenced his son to death. The legend of Ermenigild's last days relates that on the night of his execution a light from Paradise shone in his cell, and that angels watched over the grave, singing hymns in his praise. Ermenigild was sainted, and one of his bones is at Zaragoza. It was in this time of religious stress and civil discord that Saint Isidore of Seville began his labours. For about thirty-six years he ruled as governor of the church in the city. His hand was open towards the poor, and he preached with fervid eloquence. It is to the industry of Isidore that Spain owes respect, for his writings are the only basis for a history of the chief events during the Gothic epoch. He wrote the _Historia de Regibus Gothorum, Wandalorum et Suevorum_, and one of the celebrated books of study of mediævalism, _The Etymologies or Origins of Things_.