This was the western buttress of the gate of the Mediterranean, the base of the northern Pillar of Hercules, and esteemed one of the gates of Spain. By it five hundred years previously had the Moorish enemy first entered Spain at the summons of Count Julian, under their leader Tarif- abu-Zearah, whose name was bestowed upon it in remembrance of his landing there. The form of the ground is said to be like a broken punch bowl, with the broken part towards the sea. The Moors had fortified the city with a surrounding wall and twenty-six towers, and had built a castle with a lighthouse on a small adjacent island, called Isla Verde, which they had connected with the city by a causeway. Their fortifications, always admirable, have existed ever since, and in 1811, another five hundred years after, were successfully defended against the French by a small force of British troops under the command of Colonel Hugh Gough, better known in his old age as the victor of Aliwal. The walls were then unable to support the weight of artillery, for which of course they had never been built, but were perfectly effective against escalade.
For six months King Sancho besieged Tarifa by land and sea, his fleet, hired from the Genoese, lying in the waters where the battle of Trafalgar was to be fought. The city at length yielded under stress of famine, but the King feared that he had no resources to enable him to keep it, and intended to dismantle and forsake it, when the Grand Master of the military order of Calatrava offered to undertake the defense with his knights for one year, hoping that some other noble would come forward at the end of that time and take the charge upon himself.
He was not mistaken. The noble who made himself responsible for this post of danger was a Leonese knight of high distinction, by name Alonso Perez de Guzman, already called El Bueno, or 'The Good', from the high qualities he had manifested in the service of the late King, Don Alonso VI, by whom he had always stood when the present King, Don Sancho, was in rebellion. The offer was readily accepted, and the whole Guzman family removed to Tarifa, with the exception of the eldest son, who was in the train of the Infant Don Juan, the second son of the late King, who had always taken part with his father against his brother, and on Sancho's accession, continued his enmity, and fled to Portugal.
The King of Portugal, however, being requested by Sancho not to permit him to remain there, he proceeded to offer his services to the King of Morocco, Yusuf-ben-Yacoub, for whom he undertook to recover Tarifa, if 5,000 horse were granted to him for the purpose. The force would have been most disproportionate for the attack of such a city as Tarifa, but Don Juan reckoned on means that he had already found efficacious; when he had obtained the surrender of Zamora to his father by threatening to put to death a child of the lady in command of the fortress.
Therefore, after summoning Tarifa at the head of his 5,000 Moors, he led forth before the gates the boy who had been confided to his care, and declared that unless the city were yielded instantly, Guzman should behold the death of his own son at his hand! Before, he had had to deal with a weak woman on a question of divided allegiance. It was otherwise here. The point was whether the city should be made over to the enemies of the faith and country, whether the plighted word of a loyal knight should be broken. The boy was held in the grasp of the cruel prince, stretching out his hands and weeping as he saw his father upon the walls. Don Alonso's eyes, we are told, filled with tears as he cast one long, last look at his first-born, whom he might not save except at the expense of his truth and honor.
The struggle was bitter, but he broke forth at last in these words: 'I did not beget a son to be made use of against my country, but that he should serve her against her foes. Should Don Juan put him to death, he will but confer honor on me, true life on my son, and on himself eternal shame in this world and everlasting wrath after death. So far am I from yielding this place or betraying my trust, that in case he should want a weapon for his cruel purpose, there goes my knife!'
He cast the knife in his belt over the walls, and returned to the Castle where, commanding his countenance, he sat down to table with his wife. Loud shouts of horror and dismay almost instantly called him forth again. He was told that Don Juan had been seen to cut the boy's throat in a transport of blind rage. 'I thought the enemy had broken in,' he calmly said, and went back again.
The Moors themselves were horrorstruck at the atrocity of their ally, and as the siege was hopeless they gave it up; and Don Juan, afraid and ashamed to return to Morocco, wandered to the Court of Granada.
King Sancho was lying sick at Alcala de Henares when the tidings of the price of Guzman's fidelity reached him. Touched to the depths of his heart he wrote a letter to his faithful subject, comparing his sacrifice to that of Abraham, confirming to him the surname of Good, lamenting his own inability to come and offer his thanks and regrets, but entreating Guzman's presence at Alcala.
All the way thither, the people thronged to see the man true to his word at such a fearful cost. The Court was sent out to meet him, and the King, after embracing him, exclaimed, 'Here learn, ye knights, what are exploits of virtue. Behold your model.'