The title displays the cardinal fact that the Empire founded by Augustus fell in 1461; that all the changes which transformed the Europe of Marcus Aurelius into the Europe of Erasmus had not abolished the name and memory of the Empire. And whatever names of contempt—in harmony with his thesis—Gibbon might apply to the institution in the period of its later decline, such as the “Lower Empire,” or “Greek Empire,” his title rectified any false impressions that such language might cause. On the continuity of the Roman Empire depended the unity of his work. By the emphasis laid on this fact he did the same kind of service to the study of history in England, that Mr. Bryce has done in his Holy Roman Empire by tracing the thread which connects the Europe of Francis the Second with the Europe of Charles the Great.

Gibbon read widely, and had a large general knowledge of history, which supplied him with many happy illustrations. It is worth pointing out that the gap in his knowledge of ancient history was the period of the Diadochi and Epigoni. If he had been familiar with that period, he would not have said that Diocletian was the first to give to the world the example of a resignation of sovereignty. He would have referred to the conspicuous case of Ptolemy Soter; Mr. Freeman would have added Lydiadas, the tyrant of Megalopolis. Of the earlier example of Asarhaddon Gibbon could not have known.

To pass from scope and spirit to method, Gibbon’s historical sense kept him constantly right in dealing with his sources, but he can hardly be said to have treated them methodically. The growth of German erudition is one of the leading features of the intellectual history of the nineteenth century; and one of its most important contributions to historical method lies in the investigation of sources. German scholars have indeed pressed this “Quellenkunde” further than it can safely be pressed. A philologist, writing his doctoral dissertation, will bring plausible reasons to prove where exactly Diodorus ceased to “write out” Ephorus, whose work we do not possess, and began to write out somebody else, whose work is also lost to us. But, though the method lends itself to the multiplication of vain subtleties, it is absolutely indispensable for scientific historiography. It is in fact part of the science of evidence. The distinction of primary and derivative authorities might be used as a test. The untrained historian fails to recognize that nothing is added to the value of a statement of Widukind by its repetition by Thietmar or Ekkehard, and that a record in the Continuation of Theophanes gains no further credibility from the fact that it likewise occurs in Cedrenus, Zonaras or Glycas.

While evidence is more systematically arranged, greater care is bestowed on sifting and probing what our authorities say, and in distinguishing contemporary from later witnesses. Not a few important results have been derived from such methods; they enable us to trace the growth of stories. The evidence against Faustina shrinks into nothing; the existence of Pope Joan is exploded. It is irrelevant to condemn a statement of Zonaras as made by a “modern Greek”. The question is, where did he get it?

The difficult questions connected with the authorship and compilation of the Historia Augusta have produced a chestful of German pamphlets, but they did not trouble Gibbon. The relationships of the later Greek chronicles and histories are more difficult and intricate even than the questions raised by the Historia Augusta, but he did not even formulate a prudent interrogation. Ferdinand Hirsch, twenty years ago, cleared new roads through this forest, in which George the Monk and the Logothete who continued him, Leo Grammaticus and Simeon Magister, John Scylitzes, George Cedrenus and Zonaras lived in promiscuous obscurity. Büttner-Wobst on one side, C. de Boor on the other, have been working effectually on the same lines, clearing up the haze which surrounds George the Monk—the time has gone by for calling him George Hamartolus. Another formidable problem, that of John Malalas—with his namesake John of Antioch, so hard to catch,—having been grappled with by Jeep, Sotiriaděs and others, is now being more effectively treated by Patzig.

Criticism, too, has rejected some sources from which Gibbon drew without suspicion. In the interest of literature we may perhaps be glad that like Ockley he used with confidence the now discredited Al Wakidi. Before such maintained perfection of manner, to choose is hard; but the chapters on the origin of Mahometanism and its first triumphs against the Empire would alone be enough to win perpetual literary fame. Without Al Wakidi’s romance they would not have been written; and the historian, compelled to regard Gibbon’s description as he would a Life of Charles the Great based on the monk of St. Gall, must refer the inquirer after facts to Sprenger’s Life of Mahomet and Weil’s History of the Caliphs.

In connexion with the use of materials, reference may be made to a mode of proceeding which Gibbon has sometimes adopted and which modern method condemns.