Ten years passed. A fellow prisoner in the Salpetriere described Mme. Derues as "scheming, malicious, capable of anything." She was accused of being violent, and of wishing to revenge herself by setting fire to Paris. At length the Revolution broke on France, the Bastille fell, and in that same year an old uncle of Mme. Derues, an ex-soldier of Louis XV., living in Brittany, petitioned for his niece's release. He protested her innocence, and begged that he might take her to his home and restore her to her children. For three years he persisted vainly in his efforts. At last, in the year 1792, it seemed as if they might be crowned with success. He was told that the case would be re-examined; that it was possible that the Parliament had judged unjustly. This good news came to him in March. But in September of that year there took place those shocking massacres in the Paris prisons, which rank high among the atrocities of the Revolution. At four o'clock on the afternoon of September 4, the slaughterers visited the Salpetriere Prison, and fifth among their victims fell the widow of Derues. Dr. Castaing There are two reports of the trial of Castaing: "Proces Complet d'Edme Samuel Castaing," Paris, 1823; "Affaire Castaing," Paris, 1823. I AN UNHAPPY COINCIDENCE Edme Castaing, born at Alencon in 1796, was the youngest of the three sons of an Inspector-General in the department of Woods and Forests. His elder brother had entered the same service as his father, the other brother was a staff-captain of engineers. Without being wealthy, the family, consisting of M. and Mme. Castaing and four children, was in comfortable circumstances. The young Edme was educated at the College of Angers--the Alma Mater of Barre and Lebiez--where, intelligent and hard working, he carried off many prizes. He decided to enter the medical profession, and at the age of nineteen commenced his studies at the School of Medicine in Paris. For two years he worked hard and well, living within the modest allowance made him by his father. At the end of that time this young man of two or three-and-twenty formed a passionate attachment for a lady, the widow of a judge, and the mother of three children. Of the genuine depth and sincerity of this passion for a woman who must have been considerably older than himself, there can be no doubt. Henceforth the one object in life to Castaing was to make money enough to relieve the comparative poverty of his adored mistress, and place her and her children beyond the reach of want. In 1821 Castaing became a duly qualified doctor, and by that time had added to the responsibilities of his mistress and himself by becoming the father of two children, whom she had brought into the world. The lady was exigent, and Castaing found it difficult to combine his work with a due regard to her claims on his society. Nor was work plentiful or lucrative. To add to his embarrassments Castaing, in 1818, had backed a bill for a friend for 600 francs.