It is the young, healthy, vigorous blood of the country which is exposed to these unhealthy conditions.

A pure Londoner of the third generation, that is, one whose grandparents as well as his parents were born in London, is very seldom found.

It is certain that nearly all the most effective vital energy given out in London work, physical and intellectual alike, belongs to men whose fathers were country bred, if they were not country born themselves.

In kinds of work where pure physical vigour play an important part, this is most strikingly apparent.

The following statistics bearing on the London police force were obtained by Mr.Llewellyn Smith in 1888-- London born.