The new sources of information regarding the siege brought to light since Gibbon’s day enable us to gain a much more complete view of that event and of the character of its principal actors than was possible at the time when he wrote. Several Continental writers have taken advantage of some at least of the new stores of information to rewrite its story,[3] but I may be allowed to claim the good fortune of being the first Englishman who has even attempted to write a narrative of that event with the whole or even with any considerable portion of the new material before him. Before, however, proceeding to indicate what the new sources of information are, I must say something regarding the second reason I have assigned why those interested in the account of an event which marks the end of an epoch of great traditions and of a civilisation on ancient rather than on modern lines should not remain satisfied with Gibbon’s account of it. Though he claimed to examine the authorities before him with philosophical impartiality, the writers known to him belonged to the Roman Church, and he was influenced unconsciously by their representations. These writers wrote under the influence of the most bitter theological controversies. They are imbued with a spirit of rancour towards those Greeks (that is, towards the great majority of the population) who had not accepted the Union with the Church of Rome which had been decreed at Florence. Their testimony throughout their narratives is for the most part that of violent partisans. But even if Gibbon, when dealing with the disputes between the great historical Churches, had been in possession of statements of the Greek case, his contempt for both Churches was too great to allow him to do justice to the questions which divided them, questions which nevertheless, as they prevented the united action of Europe to resist the Turkish invasion, were among the most important of the time. His habit of thought as an eighteenth century theist did not allow him to attach sufficient weight to the theological aspect of the struggle between the East and the West. Everything that smelt of the cloister was hateful. The theological questions themselves were not worth discussion. The disputants were in his view narrow-minded, ignorant, and superstitious. The refinements of the definitions of the Double Procession were useless, trivial, or ridiculous. Religious zeal or enthusiasm was a thing to be condemned--was the mark of fanaticism and always mischievous. In this attitude of mind Gibbon was neither better nor worse than the majority of his philosophical contemporaries. He differed from them in being able to bequeath to future generations a work of monumental learning, in which his and their reading of the progress of Christianity in the Eastern empire was destined to have a long and deservedly great reputation. His research and eloquence, his keen sarcasm, his judicial manner, and the powerful influence of