Medina Sidonia. He was one of the most wealthy and puissant grandees
of Spain; his possessions extended over some of the most fertile
parts of Andalusia, embracing towns and seaports and numerous
villages. Here he reigned in feudal state like a petty sovereign,
and could at any time bring into the field an immense force of
vassals and retainers.

The duke of Medina Sidonia and the marques of Cadiz, however, were
at this time deadly foes. An hereditary feud existed between them,
which had often risen to bloodshed and open war; for as yet the
fierce contests between the proud and puissant Spanish nobles had
not been completely quelled by the power of the Crown, and in this
respect they exerted a right of sovereignty in leading their vassals
against each other in open field.

The duke of Medina Sidonia would have appeared, to many, the very
last person to whom to apply for aid of the marques of Cadiz; but
the marchioness judged of him by the standard of her own high
and generous mind. She knew him to be a gallant and courteous
knight, and had already experienced the magnanimity of his spirit,
having been relieved by him when besieged by the Moors in her
husband's fortress of Arcos. To the duke, therefore, she applied in
this moment of sudden calamity, imploring him to furnish succor to
her husband. The event showed how well noble spirits understand
each other. No sooner did the duke receive this appeal from the wife
of his enemy than he generously forgot all feeling of animosity and
determined to go in person to his succor. He immediately despatched
a courteous letter to the marchioness, assuring her that in
consideration of the request of so honorable and estimable a lady,
and to rescue from peril so valiant a cavalier as her husband, whose