Henry Jephson, The Sanitary Evolution of London
“ Trade, and commerce, and wealth, and population, were increasing by leaps and bounds; and like the rings which year by year are added to the trunk of a tree, so year by year, decade by decade, London—the metropolis—spread out, and grew, and grew. From something under one million of inhabitants in 1801, the population increased to nearly two and a half millions in 1851, partly by natural increase, due to the number of those who were born being greater than of those who died, partly by immigration from the country. ”
