London is a world in itself … It contains within itself all that is gorgeous in wealth, and all that is squalid in poverty; all that is illustrious in knowledge, and all that is debased in ignorance; all that is beautiful in virtue, and all that is revolting in crime. Adequately to chronicle and to describe such a city … is a task beyond any individual powers.

Charles Knight (1791-1873), The Penny Magazine of the Society for the Diffusion of Useful Knowledge