Castanier went along the Rue du Faubourg-Montmartre, slackening his pace as he neared the Rue Richer. There on the second floor of a block of buildings which looked out upon some gardens lived the unconscious cause of Castanier’s crime--a young woman known in the quarter as Mme. de la Garde. A concise history of certain events in the cashier’s past life must be given in order to explain these facts, and to give a complete presentment of the crisis when he yielded to temptation. Mme. de la Garde said that she was a Piedmontese. No one, not even Castanier, knew her real name. She was one of those young girls, who are driven by dire misery, by inability to earn a living, or by fear of starvation, to have recourse to a trade which most of them loathe, many regard with indifference, and some few follow in obedience to the laws of their constitution. But on the brink of the gulf of prostitution in Paris, the young girl of sixteen, beautiful and pure as the Madonna, had met with Castanier. The old dragoon was too rough and homely to make his way in society, and he was tired of tramping the boulevard at night and of the kind of conquests made there by gold. For some time past he had desired to bring a certain regularity into an irregular life. He was struck by the beauty of the poor child who had drifted by chance into his arms, and his determination to rescue her from the life of the streets was half benevolent, half selfish, as some of the thoughts of the best of men are apt to be. Social conditions mingle elements of evil with the promptings of natural goodness of heart, and the mixture of motives underlying a man’s intentions should be leniently judged. Castanier had just cleverness enough to be very shrewd where his own interests were concerned. So he concluded to be a philanthropist on either count, and at first made her his mistress. “Hey! hey!” he said to himself, in his soldierly fashion. “I am an old wolf, and a sheep shall not make a fool of me. Castanier, old man, before you set up housekeeping, reconnoitre the girl’s character for a bit, and see if she is a steady sort.”