Winchester Cathedral is over 900 years old. Its pillars and archways stand solid and strong. Yet in 1905, parts of its east end were close to collapse. It needed new foundations, but only a diver could clear the flooded trenches beneath the ancient walls. So William Walker, a deep-sea diver, worked in the murky water for six hours a day, every week, for five and a half years.

Along with a Foreword by the Dean of Winchester Cathedral, and diagrams to show how the diver worked beneath the walls, this book's straightforward text and absorbing illustrations reveal the extraordinary achievement of William Walker, often known as 'Diver Bill' - the man who saved Winchester Cathedral with his bare hands.