Spain. He had quarrelled with Pedro Navarro, the general in command of the expedition, and was moreover alarmed by reports that Ferdinand was plotting to deprive him of his archbishopric in favour of his illegitimate son, the Archbishop of Saragossa. Pedro Navarro remained behind, and in a few months effected a series of brilliant conquests. Bugia fell after a siege; Algiers and Tlemcen surrendered; Tripolis was stormed. Grown overbold, Navarro fell into an ambuscade among the sandhills of the waterless island of Gelves; the greater part of his army perished; and the tide of Spanish conquest in Africa was stayed for a time (August, 1510).
The recovery of Roussillon and Cerdagne gave Ferdinand command of the eastern passes of the Pyrenees; but Spanish unity was still incomplete, while the kingdom of Navarre lying astride-of the western end of the range held the keys of Spain. Torn by the continual wars of her two great factions, the Beaumonts and Grammonts, and crushed by the neighbourhood of more powerful States, Navarre could not hope to preserve her independence. She was, moreover, ruled by a feeble dynasty that had not taken root in the soil. Navarre had belonged to Ferdinand's father in right of his first wife, but had passed by right of marriage to her great-grandson Fra^ois Phebus Count of Foix, and, later, to his sister Catherine. Ferdinand sought to secure the prize by marrying his son to Catherine. The scheme was frustrated by her mother Madeleine, sister of Louis XII; and Catherine married Jean d'Albret, a Gascon nobleman whose large estates lay on the border of Lower Navarre. Nevertheless Ferdinand found means of frequently interfering in the affairs of his neighbours. He protected the Beaumont faction and the dynasty against King Louis, who supported the claims of a younger branch of the House of Foix, represented first by the Viscount of Narbonne, and later by Gaston Phebus, brother of Ferdinand's second wife.
In 1511 Pope Julius II, the Emperor, the Venetians, Ferdinand, and Henry VIII of England formed the Holy League for the purpose of crushing France. Bent on his scheme of recovering Guyenne Henry sent an army to Guipuzcoa to cooperate with the Spaniards (1512). Ferdinand's opportunity had now come. He demanded a free passage for his troops through Navarre, and the surrender of fortresses as a guarantee of neutrality. Jean d'Albr'et tried to evade compliance by allying himself with the French. Ferdinand retaliated by a manifesto declaiming against his faithlessness and ingratitude, and by ordering the Duke of Alva to invade Navarre (July, 1512). Five days later the Spaniards, aided by the Beaumontais, encamped before Pamplona, and Jean d'Albret fled to seek help from the French army encamped near Bayonne. Pamplona surrendered on receiving guarantees of its liberties, which it held dearer than its foreign dynasty.
Failing to get help from the French, Jean d'Albret, though his