In 1919–20 the turrets on the "west" front were found to be in danger of collapsing into the street below. They were taken down and rebuilt by the Sheffield firm of O'Neill & Son under the direction of Charles M. Hadfield, grandson of the Cathedral's original architect. In 1924 the War Memorial Chapel in the "north" transept was opened, commemorating the fallen in World War I. By 1934 the Cathedral's spire was found to have strayed from the perpendicular and the Civic authorities ordered that some sixty feet be removed. Repairs were not completed until 1938. Restoration and repair of damage sustained in the Second World War was carried out in the immediate post-war years.