The authors of this volume have not worked in conjunction. Widely separated, engaged on other duties, and pressed for time, we have had no opportunity for interchange of views. Each must be held responsible, therefore, for his own section alone. If there be any discrepancies in our writings (it is not unlikely in so disputed a field of history) we can only regret an unfortunate result of the circumstances. Owing to rapid change in the relations of our country to the several Balkan peoples, the tone of a section written earlier may differ from that of another written later. It.
