The first of the expedients which would lead to a permanent improvement in these matters is the establishment of a minimum of soundness and sanitary convenience in houses, below which standard it shall be illegal to inhabit a house at all. There should be a certain relation between the size of rooms and their ventilating appliances, a certain minimum of lighting, certain conditions of open space about the house and sane rules about foundations and materials. These regulations would vary with the local density of population--many things are permissible in Romney marsh, for example, which the south-west wind sweeps everlastingly, that would be deadly in Rotherhithe. At present in England there are local building regulations, for the most part vexatious and stupid to an almost incredible degree, and compiled without either imagination or understanding, but it should be possible to substitute for these a national minimum of habitability without any violent revolution. A house that failed to come up to this minimum--which might begin very low and be raised at intervals of years--would, after due notice, be pulled down. It might be pulled down and the site taken over and managed by the local authority--allowing its owner a portion of its value in compensation--if it was evident his failure to keep up to the standard had an adequate excuse. In time it might be possible to level up the minimum standard of all tenements in towns and urban districts at any rate to the possession of a properly equipped bathroom for example, without which, for hardworking people, regular cleanliness is a practical impossibility. This process of levelling-up the minimum tenement would be enormously aided by a philanthropic society which would devote itself to the study of building methods and materials, to the evolution of conveniences, and the direction of invention to lessening the cost and complication of building wholesome dwellings.