"I do--for my niece was beautiful, and the prince wooed her--.
But enough of that: at his scaffold, or at the rack, I shall be avenged on Roderigo Calderon.

You said the Cardinal was your kinsman; you are, then, equally related to his son, the Duke d'Uzeda.

Apply not to Lerma; he is the tool of Calderon.

Apply yourself to Uzeda; he is Calderon's mortal foe.

While Calderon gains ground with the prince, Uzeda advances with the king.