"Conan's eyes blazed and he started as if stung; the guards tensed, grasping their bills, then relaxed as he dropped his head suddenly, as if in sullen resignation, and not even Demetrio could tell that he was watching them from under his heavy black brows, with eyes that were slits of blue bale-fire."
January 1, 1970
https://en.wikiquote.org/wiki/Blue_eyes