The question remains, on which we do not propose to dogmatise, whether the ideal of a reviewer should be critical or explanatory: whether, in other words, he should attempt final judgment or offer comment and analysis from which we may each form our own opinion. Probably no hard and fast line can be drawn between the review and the essay; yet a good volume of criticism can seldom be gleaned from periodicals. For one thing all journalism, whether consciously or unconsciously, must contain an appeal to the moment. The reviewer is introducing new work to his reader, the essayist, or critic proper, may nearly always assume some familiarity with his subject. The one hazards prophecy; the other discusses, and illumines, a judgment already formed, if not established. It is obvious that such reviews as Macaulay's in the _Edinburgh_ were often permanent contributions to critical history; while, on the other hand, many ponderous effusions of the _Quarterly_ are only interesting as a sign of the times. The fame of a review, however, does not always depend on merit. The scandalous attacks on the Cockney school, for example, were neither good literature nor honest criticism. We still pause in wonder before the streams of virulent personal abuse and unbridled licence in temper which disgrace the early pages of volumes we now associate with sound and dignified, if somewhat conventional, utterances on the art of Literature as viewed from the table-land of authority. And, as inevitably the most famous reviews are those which attend the birth of genius, we must include more respectable errors of judgment, if we find also several remarkable appreciations which prove singular insight. Following the "early" reviews, whether distinguished for culpable blindness, private hostility, or rare sympathy, we must depend for our second main source of material upon that fortunate combination of circumstances when one of the mighty has been invited to pass judgment upon his peers. When Scott notices Jane Austen, Macaulay James Boswell, Gladstone and John Stuart Mill Lord Tennyson, the article acquires a double value from author and subject. Curiously enough, as it would seem to us in these days of advertisement, many such treasures of criticism were published anonymously; and accident has often aided research in the discovery of their authorship. It is only too probable that more were written than we have yet on record.