Milman, _History of Latin Christianity_. Gibbon, _Decline and Fall of the Roman Empire_ (ed. Bury). {210} Bury, _History of the Later Roman Empire_. Bryce, _Holy Roman Empire_. Oman, _The Dark Ages_. Hodgkin, _Italy and her Invaders_. Hauck, _Kirchengeschichte Deutschlands_. Harnack, _Dogmengeschichte_. Duchesne, _Les Eglises Separees_. " _Les Premiers Temps de L'Etat Pontifical_. H. Leclercq, _L'Afrique chretienne_. " _L'Espagne chretienne_. M. J. Labourt, _Le Christianisme dans l'Empire perse_. P. J. Pargoire, _L'Eglise byzantine, de 527 a 847_. A. J. Butler, _The Arab Conquest of Egypt_. Diehl, _L'Afrique byzantine_. " _Justinien_. " _Etudes sur l'administration byzantine dans l'Exarchat de Ravenne_. F. H. Dudden, _Gregory the Great_. Hefele, _History of the Councils_. Gasquet, _L'Empire byzantin et la Monarchie franque_. Hutton, _The Church of the Sixth Century_. Besse, _S. Wandrille_. Du Bourg, _S. Odon_. Martin, _S. Colomban_. Hodgkin, _Charles the Great_. Davis, _Charlemagne_. Fisher, _The Medieval Empire_. Hunt, _The English Church, 597-1066_. Margoliouth, _Mohammed_. Gardner, _Theodore of Studium_. Marin, _De Studio Constantinopolitano_. Lavisse (ed.), _Histoire de France_. Marignan, _Etudes sur la civilisation francaise (la societe merovingienne)_. Luetzow, _Bohemia_. Morfill, _Poland_. Rambaud, _Histoire de la Russie_. Poole, _Illustrations of Medieval Thought_. Kraus, _Geschichte der Christlichen Kunst_, I. Potthast, _Bibliotheca Medii Aevi_. {211} INDEX