A historian, to make a mark, must show some originality somewhere in his work. The originality may be in a method of investigation; it may be in the use of some hitherto inaccessible or unprinted material; it may be in the employment of some sources of information open to everybody, but not before used, or it may be in a fresh combination of well-known and well-elaborated facts. It is this last-named feature that leads Mr. Winsor to say, in speaking of the different views that may be honestly maintained from working over the same material, "The study of history is perennial." I think I can make my meaning clearer as to the originality one should try to infuse into historical work by drawing an illustration from the advice of a literary man as to the art of writing. Charles Dudley Warner once said to me, "Every one who writes should have something to add to the world's stock of knowledge or literary expression. If he falls unconsciously into imitation or quotation, he takes away from his originality. No matter if some great writer has expressed the thought in better language than you can use, if you take his words you detract from your own originality. Express your thought feebly in your own way rather than with strength by borrowing the words of another." This same principle in the art of authorship may be applied to the art of writing history. "Follow your own star," said Emerson, "and it will lead you to that which none other can attain. Imitation is suicide. You must take yourself for better or worse as your own portion." Any one who is bent upon writing history, may be sure that there is in him some originality, that he can add something to the knowledge of some period. Let him give himself to meditation, to searching out what epoch and what kind of treatment of that epoch is best adapted to his powers and to his training. I mean not only the collegiate training, but the sort of training one gets consciously or unconsciously from the very circumstances of one's life. In the persistence of thinking, his subject will flash upon him. Parkman, said Lowell, showed genius in the choice of his subject. The recent biography of Parkman emphasizes the idea which we get from his works--that only a man who lived in the virgin forests of this country and loved them, and who had traveled in the far West as a pioneer, with Indians for companions, could have done that work. Parkman's experience cannot be had by any one again, and he brought to bear the wealth of it in that fifty years' occupation of his. Critics of exact knowledge--such as Justin Winsor, for instance--find limitations in Parkman's books that may impair the permanence of his fame, but I suspect that his is the only work in American history that cannot and will not be written over again. The reason of it is that he had a unique life which has permeated his narrative, giving it the stamp of originality. No man whose training had been gained wholly in the best