The book tells a social condition about London during Victorian era which had sewerage problems. At that time children were being used to clean the sewerage system in the house or building. Not only human, but also the dump from horses as the main transportation during that time.
from the back cover: Come with us to London - a city as old as the Romans, and as new as the twenty-first century. There are places to go - from Oxford Street to Westminster Abbey, from Shakespeare's Globe Theatre to Wimbledon Tennis Club. And things to do - ride on the London Eye, visit the markets, go to the theatre, run in the London Marathon. Big, beautiful, noisy, exciting - that's Lon…