H. Rider Haggard 
Fair Margaret [EPUB ebook] 

Poor and fatherless, Peter delivered the killing blow in self-defense—and because of his helpless love for Margaret—dark-eyed daughter of John Castell, the kindly and wealthy merchant who has overseen his upbringing.
Now another pursues fair Margaret—the powerful Marquis d’Aguilar of Spain, traveling in England upon a secret mission for the Inquisition. More than love hangs in the balance!