The influence of high rents is to force more people into a given space, in order to economize and divide expense. The latest trustworthy statistics on this important subject are from the excellent Reports of the Metropolitan Board of Health for 1866. From these, it appears that the Eleventh Ward of this city, with a population of 58,953, has a rate of population of 196,510 to the square mile, or 16 1/10 square yards to each person; the Tenth Ward, with 31,587 population, has a rate of 185,512 to the square mile, or 17 1/10 square yards to each; the Seventeenth Ward, with 79,563, has the rate of 153,006; the Fourteenth, with 23,382, has a rate of 155,880; the Thirteenth, with 26,388, has 155,224; and so on with others, though in less proportion. The worst districts in London do not at all equal this crowding of population. Thus, East London shows the rate of 175,816 to the square mile; the Strand, 141,556; St. Luke's, 151,104; Holborn, 148,705; and St. Jame's, Westminster, 144,008. If particular districts of our city be taken, they present an even greater massing of human beings than the above averages have shown. Thus, according to the Report of the Council of Hygiene in 1865, the tenant-house and cellar population of the Fourth Ward numbered 17,611 packed in buildings over a space less than thirty acres, exclusive of streets, which would make the fearful rate of 290,000 to the square mile. In the Seventeenth Ward, the Board of Health reports that in 1868, 4,120 houses contained 95,091 inhabitants, of whom 14,016 were children under five years. In the same report, the number of tenement-houses for the whole city is given at 18,582, with an estimate of one-half the whole population dwelling in them--say 500,000. We quote an extract from a report of Mr. Dupuy, Visitor of the Children's Aid Society of the First Ward, describing the condition of a tenement-house: "What do you think of the moral atmosphere of the home I am about to describe below? To such a home two of our boys return nightly. "In a dark cellar filled with smoke, there sleep, all in one room, with no kind of partition dividing them, two men with their wives, a girl of thirteen or fourteen, two men and a large boy of about seventeen years of age, a mother with two more boys, one about ten years old, and one large boy of fifteen; another woman with two boys, nine and eleven years of age--in all, _fourteen persons._ "This room I have often visited, and the number enumerated probably falls below, rather than above the average that sleep there." It need not be said that with overcrowding such as this, there is always disease, and as naturally, crime. The privacy of a home is undoubtedly one of the most favorable conditions to virtue, especially in a girl.