The next woman to occupy a conspicuous place in the annals of Aragon and Navarre is Dona Juana Henriquez, the second wife of this same John II. Dona Juana was the daughter of Don Fadrique Henriquez, Admiral of Castile, who had become the most influential man in the kingdom during a moment of temporary disgrace for Alvaro de Luna; and at this time of his success, for factional reasons, John considered that an alliance with the admiral might further his own plans with respect to Castile. This second wife was not a woman of high birth, and was totally unaccustomed to the new surroundings in which she found herself placed; but with the quick adaptive power which is possessed by women to so marked a degree, Juana was soon able to hold her own at court and to make a good showing, in fact, on any occasion. She was a very beautiful woman, of the traditional Spanish type, with dark eyes and dark hair, and a very engaging manner, and to her cleverness she joined a great ambition which made her unceasing in her efforts for her husband's advancement. She was inclined to be haughty and domineering in tone, was not overscrupulous, as might have been expected of one who had lived in the atmosphere of the Castilian court at this time, and the sum total of her efforts did little more than to perpetuate the period of strife and turmoil. The admiral, Don Fadrique, was in control for but a short time; and upon the return to power of Alvaro, John was driven out of the country, after being wounded in battle, and the admiral himself was killed in the fighting at Olmedo. John took his wife with him to Pamplona, where he now went, as that city offered him a most convenient exile. His return to his wife's country was not made in peace, for no sooner had he arrived than he proceeded to dispossess his son Charles, who had been openly acknowledged as his mother's heir at the time of her coronation. In the warfare which ensued, and which was a snarl of petty, selfish interests, Juana did yeoman service in her husband's cause. At the time of her hurried flight to Navarre, she had tarried for a short time in the little town of Sos, in Aragon, and there she had given birth to a son, Fernando, who was to be instrumental in bringing peace and glory to Spain in spite of the fact that he first saw the light in the midst of such tumult and confusion. Notwithstanding her delicate condition, Juana was soon in the thick of the fray, as she hastened to the town of Estella, which had been threatened, fortified the place, and defended it effectually from all the attacks made upon it by the hostile forces. She seems to have been a born fighter, and, though her efforts may often have been misdirected, she must have exerted a powerful influence upon the mind of her son, who was to show himself at a later day as good a fighter in a larger cause.