Sancho resolved to conquer this city too, for fear it should become a centre and bulwark of rebellion; but was treacherously murdered under its walls by the lance of a traitor knight, Vellido Dolfo by name. His army speedily dispersed; only a band of brave Castilians loyally kept guard over the king’s body and bore it to the abbey of San Salvador at Oña, where it was solemnly committed to the earth. On receiving the tidings of his brother’s murder, Alfonso fled secretly from Toledo, where he had been hospitably entertained, and took possession of Sancho’s kingdom. Garcia, the younger brother, also came in haste, hoping to regain Galicia, the share his father had bequeathed him. But Alfonso, who was no less ambitious and unjust than the murdered Sancho, had his brother perfidiously seized on his arrival, and kept him in captivity, loaded with fetters, for the rest of his life. [Sidenote: [1072-1126 A.D.]] Alfonso VI was now master of the whole of his father’s kingdom of Castile, Leon, and Galicia; and when his royal cousin of Navarre, a few years later, fell a victim to conspirators, he joined the king of Aragon in the conquest and partition of the bereaved kingdom; and after its brief hour of glory it was long before Navarre was again counted among independent states. Henceforward history follows the fortunes of the two kingdoms of Castile and Aragon, which rose upon its ruins. Side by side with them Catalonia flourished in the east, blest with culture and prosperity, but exercising no particular influence on the course of events; and towards the end of the century some knightly adventurers laid the foundation of the kingdom of Portugal in the west, the northern part of which Alfonso conferred first on his son-in-law, Raymond of Burgundy, and then on Count Henry, the husband of his natural daughter Theresa, as a fief of the kingdom of Castile.