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GIBBON'S AUTOBIOGRAPHY
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to the whole. There should be a central, animating idea. Gibbon's own view is indicated in his very interesting though crude French essay on the study of literature, written (1758-59) at the beginning of his literary career. It was intended to defend the doctrine—less needed, one might have supposed, then than now—that literature should not be dethroned by the mathematical and physical sciences. But he argues that a true appreciation of literature demands wide knowledge and thorough study. He insists upon the close connection of all branches of knowledge, and declares that if a philosopher is not always a historian, a historian should always be a philosopher. He should be tracing the operation of general causes. He should deal with apparent trifles; not out of mere curiosity or love of the picturesque, but because they are often the clearest indications of principles of wide application. He should inquire, for example, into the origin of grotesque mythologies, and might even, as he points out, find valuable hints in the moral notions of an ' Iroquois.' Though ill-arranged and disjointed, the essay thus shows keen glimpses into methods which have since assumed greater importance.