It would not be fair to judge of an author's notion and powers of research by a hasty and popular production. Mr. Goldwin Smith has collected quite enough information for the purpose for which he has used it, and he has not failed through want of industry. The test of solidity is not the quantity read, but the mode in which the knowledge has been collected and used. Method, not genius, or eloquence, or erudition, makes the historian. He may be discovered most easily by his use of authorities. The first question is, whether the writer understands the comparative value of sources of information, and has the habit of giving precedence to the most trustworthy informant. There are some vague indications that Mr. Goldwin Smith does not understand the importance of this fundamental rule. In his Inaugural Lecture, published two years ago, the following extravagant sentence occurs: "Before the Revolution, the fervour and the austerity of Rousseau had cast out from good society the levity and sensuality of Voltaire" (p. 15). This view--which he appears to have abandoned, for in his _Irish History_ he tells us that France "has now become the eldest daughter of Voltaire"--he supports by a reference to an abridgment of French history, much and justly esteemed in French schools, but, like all abridgments, not founded on original knowledge, and disfigured by exaggeration in the colouring. Moreover, the passage he refers to has been misinterpreted. In the _Irish History_ Mr. Goldwin Smith quotes, for the character of the early Celts, without any sufficient reason, another French historian, Martin, who has no great authority, and the younger Thierry, who has none at all. This is a point of very little weight by itself; but until our author vindicates his research by other writings, it is not in his favour. The defects of Mr. Goldwin Smith's historic art, his lax criticism, his superficial acquaintance with foreign countries, his occasional proneness to sacrifice accuracy for the sake of rhetorical effect, his aversion for spiritual things, are all covered by one transcendent merit, which, in a man of so much ability, promises great results.