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RV 174 (REST IN LONDON) mortality the preacher and the moralist are powerless. If a fitted race can be bred, a race will survive, multiply and carry on vast cities. If no such race arrive the city must die. For, sooner or late, the drain upon the counties must cease: there will be no fresh blood to infuse. If it be possible, in these great rule of thumb congeries, "sanitary conditions" must be enforced; rookeries must be cleared out; so many cubic feet of air must be ensured for each individual. (And it must be remembered that, for the Christian era, this is a new problem. No occidental cities, great in the modern sense, have existed, none have begun to exist until the beginning of the Commercial Ages. The problem is so very young that we have only just begun to turn our attention to it.)

But, if the rest that comes with extinction is not to be the ultimate lot of London, the problem must solve itself either here or there—in the evolution either of a healthy city or of a race with a strong hold upon life. We know that equatorial swamps have evolved tribes, short legged, web-footed, fitted to live in damp, in filth, in perpetual miasmas. There is no reason therefore why London should not do as much for her children. That would indeed be her justification, the apology for her existence.

The creatures of the future will come only when our London indeed is at rest. And, be they large-headed, short legged, narrow-chested, and, by our standards, hideous and miserable, no doubt they will find among themselves women to wive with, men to love and 174