Almuric by Robert E. Howard

Yasmeena cupped her chin in her slim hands and fixed her great dark eyes on me. We were alone in a chamber I had never entered before. It was night. I sat on a divan opposite her, my limbs unshackled. She had offered me temporary freedom if I would promise not to harm her, and to go back into shackles when she bade me. I had promised. I was never a clever man, but my hate had sharpened my wits. I was playing a game of my own.

-"What are you thinking of, Esau Ironhand?" she asked.