among the moderns, Macchiavelli, Guicciardini, Giannone, Hume, Robertson, Gibbon, the Cardinal de Retz, Vertot, Voltaire, Raynal, and Rulhière. Not that I would exclude the others, but these will suffice to provide all the styles which are suitable for history; for a great diversity of form is to be met with in the works of these writers." In the second place come philosophical studies; a thorough mastery of "ideology, morals, and politics" is required. "As to the works from which knowledge of this kind is to be obtained, Daguesseau has instanced Aristotle, Cicero, Grotius: I should add the best ancient and modern moralists, treatises on political economy published since the middle of the last century, the writings on political science in general, and on its details and application, of Macchiavelli, Bodin, Locke, Montesquieu, Rousseau, Mably, and the most enlightened of their disciples and commentators." In the third place, before writing history, "it is evidently necessary to know it." "A writer will not give the world new information on a subject like this unless he begins by making himself master of what is already known of it." The future historian has already made the acquaintance of the best historical works, and studied them as models of style; "it will be to his advantage to read them a second time, but endeavouring more particularly to grasp all the facts which they contain, and to let them make so deep an impression on his mind that they may be permanently fixed in his memory."
These are the "positive" notions which, eighty years ago, were considered indispensable to the general historian. At the same time there was a confused idea that "in order to acquire a profound knowledge of particular