Where Beauty Dwells — Emilie Loring

Lonely, beautiful Diane Vernon falls in love with a mysterious stranger and finds herself thrown into a world of desperate intrigue.
Strange forces menaced her. All Diane wanted was to be left alone to care for her invalid sister. But she hadn't reckoned with the uncontrollable yearnings of her heart. She had sworn not to love, but in spite of herself she found herself irresistibly drawn to dark, handsome Mac Cameron and the dazzling social whirl of the great manor. Little did she know that she was about to be plunged into a desperate plot involving espionage and murder.