The historian is not only a lover of truth, not only a chronicler of events. These, indeed, he must be at his peril, but how much more! Insight into human nature-and this implies the rarest knowledge and finest sympathy of which man is capable; the power of tracing the delicate relation between deed and motive, and the pressure of action upon circumstance and circumstance upon action; knowledge of the world, in short, in the highest sense of that expression.