A Girl of High Adventure by L. T. Meade

Marguerite St. Juste was Irish on her mother’s side, who was born of the Desmonds of Desmondstown in the County Kerry. Marguerite’s father was a French Comte, whose grandfather had been one of the victims of the guillotine.
Little Marguerite lived with an uncle, who was really only that relation by marriage; his name was the Reverend John Mansfield. He had a large living in a large town about fifty miles from London, and he adopted Marguerite shortly after the death of her parents. This tragedy happened when she was very young, almost a baby. She did not in the least remember her father, whose dancing black eyes and merry ways had endeared him to all who knew him. Nor did she recall a single fact with regard to her mother—one of those famous Desmonds, who had joined the rebels in the great insurrection of ’97, and whose people still lived and prospered and were gay and merry of the merry on their somewhat tattered and worn-out country estate.