The Champdoce Mystery by Emile Gaboriau — Read

After her repulse by Norbert, Diana, with the cold chill of death in her heart, made her way back to the Chateau of the De Laurebourgs, over the same road which but a short time before she had traveled full of expectation and hope. The sudden appearance of the Duke de Champdoce had filled her with alarm, but her imagination was not of that kind upon which unpleasant impressions remain for any long period; for after she had regained her room, and thrown aside her out-door attire, and removed all signs of mud-stains, she once more became herself, and even laughed a little rippling laugh at all her own past alarms. Overwhelmed with the shame of her repulse, she had threatened Norbert; but as she reasoned calmly, she felt that it was not he for whom she felt the most violent animosity. All her hatred was reserved for that woman who had come between her and her lover -- for Marie de Puymandour.

Some hidden feeling warned her that she must look into Marie's past life for some reason for the rupture of her engagement with Norbert, though the banns had already been published. This was the frame of mind in which Diana was when the Viscount de Mussidan was introduced to her, the friend of the brother whose untimely death had left her such a wealthy heiress. He was tall and well made, with handsomely chiseled features; and, endowed with physical strength and health, Octave de Mussidan had the additional advantages of noble descent and princely fortune. Two women, both renowned for their wit and beauty, his aunt and his mother, had been intrusted with the education which would but enable him to shine in society.