This is a fiction short story. There is not, perhaps, in all Paris, a quieter street than the Rue St. Gilles in the Marais, within a step of the Place Royale. No carriages there; never a crowd. Hardly is the silence broken by the regulation drums of the Minims Barracks near by, by the chimes of the Church of St. Louis, or by the joyous clamors of the pupils of the Massin School during the hours of recreation. At night, long before ten o'clock, and when the Boulevard Beaumarchais is still full of life, activity, and noise, every thing begins to close. One by one the lights go out, and the great windows with diminutive panes become dark. And if, after midnight, some belated citizen passes on his way home, he quickens his step, feeling lonely and uneasy, and apprehensive of the reproaches of his concierge, who is likely to ask him whence he may be coming at so late an hour. In such a street, every one knows each other: houses have no mystery; families, no secrets, -a small town, where idle curiosity has always a corner of the veil slyly raised, where gossip flourishes as rankly as the grass on the street. Thus on the afternoon of the 27th of April, 1872 (a Saturday), a fact which anywhere else might have passed unnoticed was attracting particular attention. A man some thirty years of age, wearing the working livery of servants of the upper class, -the long striped waistcoat with sleeves, and the white linen apron, was going from door to door.