_art_ which is immortal in a book, not the knowledge, or even the thoughts. What keeps alive the "Provincial Letters"? It is the style, the irony, the elegance. It is the exquisite delineation of character, the moral wisdom, the purity and force of language, the artistic arrangement, and the lively and interesting narratives, appealing to all minds, like the "Arabian Nights," or Froissart's "Chronicles," which give immortality to the classic authors of antiquity. We will not let them perish, because they amuse us, and inspire us. Livy doubtless was too ambitious in aspiring to write accurately the whole history of his country. He would have been wiser had he confined himself to a particular epoch, of which he was conversant, like Tacitus and Thucydides. But it is taking a narrow view of history to make all writers after the same pattern, even as it would be bigoted to make all Christians belong to the same sect. Some will be remarkable for style, others for learning, and others again for moral and philosophical wisdom. Some will be minute, and others generalizing. Some dig out a multiplicity of facts without apparent object, and others induce from those facts. Some will make essays, and others chronicles. We have need of all styles and all kinds of excellence. A great and original thinker may not have the time or opportunity or taste for a minute and searching criticism of original authorities; but he may be able to generalize previously established facts, so as to draw most valuable moral instruction. History is a boundless field of inquiry. No man can master it, in all its departments and periods. What he gains in minute details, he is apt to lose in generalization. If he attempts to embody too much learning, he may be deficient in originality; if he would say every thing, he is apt to be dry; if he elaborates too much, he loses life. Society, too, requires different kinds and styles of history,--history for students, history for ladies, histories for old men, histories for young men, histories to amuse, and histories to instruct. If all men were to write history according to Dr. Arnold's views, then we should have histories of interest only to classical scholars. A fellow of Christ Church may demand authorities, even if he never consults one of them, but a member of Congress may wish to see learning embodied in the text, and animated by genius, after the fashion of the ancient historians, who never quoted their sources of knowledge, and who were valued for the richness of thoughts and artistic beauty of style. The ages in which they flourished, attached no value to pedantic displays of labor, or evidences of learning paraded in foot-notes. [Sidenote: Greatness of the ancient historians.]