A certain number of prostitutes are sent every year to the prison of St. Denis. These are those who, from physical or mental infirmities, such as recto-vaginal fistula, cancer, incurable organic disease, idiocy, etc., are incapacitated from pursuing their calling, and run risk of starvation. Not more than eight or ten of these are sent to St. Denis in the course of the year. The mortality among them there is not less than twenty-five per cent. per annum.[212] Until a few years ago, a tax was levied on the Paris prostitutes for the support of the Dispensary. Each mistress of a house paid twelve francs per month; each girl living alone, three francs per month. A fine of two francs was also laid on all prostitutes who were behind their time in visiting the Dispensary. The product of these various taxes amounted to from seventy-five to ninety thousand francs per annum. The system was abolished on the ground of its immorality. A popular notion is said to have prevailed that the police received half a million or more from the tax on prostitution, and attacks on the administration in consequence were incessant. The police authorities gave way at last, and the municipal council of the city undertook to defray the cost of the Dispensary for the future. Similar taxes appear to have existed at Lyons, Strasbourg, and other cities.[213] Allusion has been made to inspectors. At the time M. Parent-Duchatelet wrote there were ten inspectors, who had each charge of one tenth of the city. Their business was to see that the regulations governing prostitutes were carried out. They arrested offending women, and transferred them to the Prefecture of Police. In case of resistance, they summoned the aid of the ordinary police of the ward. They were not allowed themselves to use violence either to arrest or drag a girl to prison. They were usually picked men of good character. Their salary was twelve hundred francs a year, besides handsome presents.[214]