Heavy horses played a pivotal role in the development of western economies, toiling in mines and quarries, at mills, factories and docks, alongside canals and railway lines, in fields and pasture. But with the invention of the tractor and motor lorry their numbers plummeted, with some breeds close to extinction in the 1950s. Today, after a revival of interest, Shires, Clydesdaies, Suffolks and British Percherons attract special attention whenever they are seen, their magnificence and strength ensuring them a place in the modern world. This book examines the breeds and their qualities, their historical role, the industry that built up around them and the revival years.