From every part of the earth where Roman feet have trod, these direct witnesses to the past arise from the grave in almost disquieting abundance: the inexhaustible soil of Rome and its immediate vicinity has already yielded more than thirty-five thousand stones; we possess more than thirty thousand from other parts of Italy; and the number of those bestowed upon us by Africa, which was not opened up to research until the last century, is hardly smaller. Again, the Illyrian provinces, Dalmatia first and foremost, but Roumania, Bulgaria, and Servia, all in their degree, and even Bosnia, almost unknown ground till a short time ago, have become rich mines of discovery in our own days, thanks to increased facilities of communication and to the civilisation which has made its way into those countries. There is, no doubt, much chaff that has attained to an unmerited longevity in these stone archives, much that we would willingly let go by the board. But one thing is certain: that only out of these materials--which of late have been singularly supplemented by the masses of papyri discovered in Egypt--can a history of the Roman Empire be constructed; and that any one who addresses himself to the solution of a problem of this kind without exact knowledge of them, though he were as great a man as Leopold von Ranke, must fall far short of the goal within reach. What can be done with such materials has been shown by Mommsen in the masterly description of the provinces from the time of Cæsar to the reign of Diocletian, given in the fifth volume of his _History of Rome_, a volume which not only forms a worthy sequel to those which preceded it, but in many respects marks an advance upon them, and makes us all the more painfully aware of the gap which we dare scarcely hope to see filled by his master hand. THE MEANING OF IMPERIAL ROMAN HISTORY What is the secret of the vivid interest which the Roman Empire awakens even in the minds of those who feel little drawn towards the study of antiquity? It is, in the first place, undoubtedly because this period is in many respects more modern in character than any other of ancient times; far more so than the Byzantine Empire or the Middle Ages. It is a period of transition, in which vast revolutions came about in politics and religion and the seed of a new civilisation was sown. Its true significance is not to be found in the creation of a world-wide empire. Republican Rome had already subdued the East in her inexorable advance; Macedonia and Greece, Syria, Asia, Africa, and, finally, Egypt, had fallen into her hands before the setting up of the imperial throne.