Bell Rock, a small outcrop lying just below the roiling waves of the North Sea, had long been the site of smashed ships and doomed sailors, with an estimated 6 shipwrecks per year as the 18th century drew to a close. With the need for navigational warning, Robert Stevenson took command of the planning and construction of what would become the legendary Bell Rock Lighthouse. In his Account, Stevenson details the monumental task of building a structure to stand up to the ferocity of the open ocean, using revolutionary engineering and construction techniques, on a rock only visible a few hours a day at low tide.