A wish has often been expressed to me that the History of Rome might be continued, and I have a desire to meet it, although it is difficult for me, after an interval of thirty years, to take up again the thread at the point where I had to let it drop. That the present portion does not attach itself immediately to the preceding, is a matter of little moment; the fifth volume would be just as much a fragment without the sixth as the sixth now is without the fifth. Besides, I am of opinion that, for the purposes of the cultured public, in whose minds this History is intended to promote an intelligent conception of Roman antiquity, other works may take the place of the Two Books, which are still wanting between this (the Eighth) and the earlier ones, more readily than a substitute can be found for that now issued. The struggle of the Republicans in opposition to the monarchy erected by Caesar, and the definitive establishment of the latter, are so well presented in the accounts handed down to us from antiquity that every delineation amounts essentially to a reproduction of their narrative. The distinctive character of the monarchical rule and the fluctuations of the monarchy, as well as the general relations of government influenced by the personality of the individual rulers, which the Seventh Book is destined to exhibit, have been at least subjected to frequent handling. Of what is here furnished—the history of the several provinces from the time of Caesar to that of Diocletian,—there is, if I am not mistaken, no comprehensive survey anywhere accessible to the public to which this work addresses itself; and it is owing, as it seems to me, to the want of such a survey that the judgment of that public as to the Roman imperial period is frequently incorrect and unfair. No doubt such a separation of these special histories from the general history of the empire, as is in my opinion a preliminary requisite to the right understanding of the history of the imperial period, cannot be carried out completely as regards various sections, especially for the period from Gallienus to Diocletian; and in these cases the general picture, which still remains to be given, will have to supply what is wanting.

If an historical work in most cases acquires a more vivid clearness by an accompanying map, this holds in an especial degree true of our survey of the Empire of three Continents according to its provinces, and but few of its readers can have in their hands maps adequate for the purpose. These will accordingly be grateful, along with me, to my friend Dr. Kiepert, for having, in the manner and with the limits suggested by the contents of these volumes, annexed to them, first of all, a sheet presenting a general outline of the Orbis Romanus, which serves moreover in various respects to supply gaps in those that follow, and, in succession, nine special maps of the several portions of the empire drawn—with the exception of sheets 5, 7, 8, 9—on the same scale. The ancient geographical names occurring in the volumes, and the more important modern ones, are entered upon the maps; names not mentioned in the volumes are appended only, in exceptional cases, as landmarks for the reader’s benefit. The mode of writing Greek names followed in the book itself has been displaced by the Latinising spelling—for the sake of uniformity—in several maps in which Latin names preponderate. The sequence of the maps corresponds on the whole to that of the book; only it seemed, out of regard for space, desirable to present on the same sheet several provinces such as, e.g. Spain and Africa.