Mr. Goldwin Smith, like Macaulay, has written on the study of history, and he has been a keen critic of other historians before becoming one himself. It is a bold thing for a man to bring theory so near to execution, and, amidst dispute on his principles and resentment at his criticism, to give an opportunity of testing his theories by his own practice, and of applying his own canons to his performance. It reminds us of the professor of Cologne, who wrote the best Latin poem of modern times, as a model for his pupils; and of the author of an attack on Dryden's _Virgil_, who is styled by Pope the "fairest of critics," "because," says Johnson, "he exhibited his own version to be compared with that which he condemned." The work in which the professor of history and critic of historians teaches by example is not unworthy of his theory, whilst some of its defects may be explained by it. The point which most closely connects Mr. Goldwin Smith's previous writings with his _Irish History_ is his vindication of a moral code against those who identify moral with physical laws, who consider the outward regularity with which actions are done to be the inward reason why they must be done, and who conceive that all laws are opposed to freedom. In his opposition to this materialism, he goes in one respect too far, in another not far enough. On the one hand, whilst defending liberty and morality, he has not sufficient perception of the spiritual element; and on the other, he seems to fear that it would be a concession to his antagonists to dwell on the constant laws by which nature asserts herself, and on the regularity with which like causes produce like effects. Yet it is on the observation of these laws that political, social, and economical science rests; and it is by the knowledge of them that a scientific historian is guided in grouping his matter. In this he differs from the artist, whose principle of arrangement is drawn from himself, not from external nature; and from the annalist, who has no arrangement, since he sees, not the connection, but the succession of events. Facts are intelligible and instructive,--or, in other words, history exhibits truths as well as facts,--when they are seen not merely as they follow, but as they correspond; not merely as they have happened, but as they are paralleled. The fate of Ireland is to be understood not simply from the light of English and Irish history, but by the general history of other conquests, colonies, dependencies, and establishments. In this sort of illustration by analogy and contrast Mr. Goldwin Smith is particularly infelicitous. Nor does Providence gain what science loses by his treatment of history. He rejects materialism, but he confines his view to motives and forces which are purely human.