The historians' history of the world in twenty-five volumes, volume 08
CHAPTER II. THE FIRST CRUSADE
[b] E. GIBBON, _Decline and Fall of the Roman Empire_.
[c] FR. WILKEN, _Geschichte der Kreuzzüge_.
[d] J. F. MICHAUD, _Bibliothèque des Croisades_ (including many Arab accounts).
[e] VICTOR DURUY, _Histoire du Moyen Age_.