At this period the grave inconveniences which have by degrees asserted themselves in France as the result of the cellular system were not yet clearly recognised. Thus it was that the first poor wretches who, after their transfer from La Force, found themselves suddenly immured in the cells of Mazas, were seized with fits of fury and despair which soon took the proportions of a panic and a riot. The whole building resounded with incessant cries and shouts: the condemned, isolated from one another, and exasperated by their solitude, trying to converse by shouts with their old acquaintances lodged in distant cells. Some requested as a favour to be taken back to La Force. At length the administration felt it discreet to order an inquiry into the state of things, and the Academy of Medicine was consulted. M. de Pietra-Santa, an eminent member of that body, wrote, in a report which he laid before his colleagues: “The cellular system employed in prisons plays deadly havoc with the intellectual faculties. It develops scrofulous diseases, and urges its victims to suicide.” Statistics were quoted to show what a formidable proportion of cell-confined prisoners either took or attempted their own lives. In the end the Academy of Medicine denounced the prison-cell in uncompromised terms; and, in consequence, the system of isolation ceased at the Mazas prison to be rigorously enforced. As, however, the edifice had been constructed on a particular plan which did not permit of its conversion into an ordinary prison, its original purposes were modified by the confinement within its walls only of prisoners under short sentences. “In these circumstances,” says a contemporary French writer, “solitary confinement, far from being an inconvenience, presents in general the advantage of not mixing prisoners arrested from very diverse causes, and the moral character of whose offences widely differs. Moreover, the individual who may perhaps be acquitted to-morrow has not to endure a regrettable contact, which is often dangerous.” The Mazas prison is surrounded by a girdle wall which conceals it from the public gaze; though the curious can easily defeat this difficulty by mounting the viaduct of the railway of Vincennes, which traverses the Faubourg Saint-Antoine. From this elevation a bird’s-eye glance of the whole of the buildings may be obtained.