1888. Lea, an American historian, devoted himself to research, mainly on church history in the later middle ages, and his literary reputation rests on the important books he produced on this subject. However, his great contribution was his originality and his profound influence in impressing on American historians the importance of direct study of sources. This is Volume III of III. Contents: The Spiritual Franciscans; Guglielma and Dolcino; The Fraticelli; Political Heresy Utilized by the Church; Political Heresy Utilized by the State; Sorcery and Occult Arts; Witchcraft; and Intellect and Faith. See other works by this author available from Kessinger Publishing. Vol. 1 ISBN 0766188930, Vol. 2 ISBN 0766188949.