-T HE growth of population in England and Wales in the nineteenth century falls into two distinct phases. In the first half of the century, down to 1851, there prevailed a general increase of the population in both urban and rural districts, the aggregate rate of increase being proportional to the size of the unit, greatest for the large cities with more than oo00,000 and least for the rural areas with less than 2000 inhabitants. The second phase, I85I-I90I, has two distinctive features. First, the aggregate rate of increase of the large cities is exceeded by that of the smaller cities (20,o00-IOO,ooo), a feature that first appeared in the decade I86I-I87I and was well marked by I89I. Second, in 1851 began the rural exodus, arising from complicated economic and historical circumstances with their roots in the Agrarian Revolution of the early nineteenth century, the Poor Law Policy which persisted till 1834, and the repeal of the Corn Laws in the forties.