It has reached what is termed "saturation point." Introduce strangers, and they can only stay on condition that they push out, and take the place of, earlier residents.
So we find in all districts of large towns, where poverty lies thickest, the inflow is less than the outflow.

The great stream of incomers goes to swell the population of parts not hitherto overcrowded, thus ever increasing the area of dense city population.

Districts like Bethnal Green and Mile End are found to show the smallest increase, while outlying districts like West Ham grow at a prodigious pace.
Sec.2.Rate of Migration from Rural Districts .-- But perhaps the most instructive point of view from which to regard the absorption of country population by the towns is not from inside but from outside.
Confining our attention for the present to migration from the country to the town, and leaving the foreign immigration for separate treatment, we find that the large majority of incomers to London are from agricultural counties, such as Kent, Bucks, Herts, Devon, Lincoln, and not from counties with large manufacturing centres of their own, like Yorkshire, Lancashire, and Cheshire.

The great manufacturing counties contribute very slightly to the growth of London.

While twelve representative agricultural counties furnished sixteen per 1000 of the population of London in 1881, twelve representative manufacturing counties supplied no more than two-and-a-half per 1000.
Respecting the rate of the decline of agricultural population exaggerated statements are often made.