The Ghost Map

But at 40 Broad Street, Soho, Sarah Lewis was awake tending to her feverish baby girl. As she threw a used bucket of water into the cesspool at the front of her lodgings, it marked the start of a cholera epidemic that would consume 50,000 lives in England and Wales - and become a battle between man and microbe unlike any other. Steven Johnson takes us day by day through what happened and re-creates a London full of dust heaps, furnaces and slaughterhouses; where a ghost class of bone-pickers, rag gatherers, dredger men and mud-larks scavenged off waste; where families were crammed into tiny rooms and cartloads of bodies wheeled down the streets.