According to Ignatius of Loyola there was no one to whom the Society owed more than to Diego Lainez. This present volume has three parts: A biography of Diego Lainez, S.J., the second superior general of the Society of Jesus; his lengthy 1547 letter to Juan de Polanco, secretary of the Society, a letter sometimes called the first "biography" of Ignatius of Loyola and an account of the founding…