[72] These dates, distinguished from the rest by braces, are proposed as mere conjectures, founded upon the probable length of generations. Wherever chronology is possible, researches such as those of Mr. Clinton, which have conduced so much to the better understanding of the later times of Greece, deserve respectful attention. But the ablest chronologist can accomplish nothing, unless he is supplied with a certain basis of matters of fact, pure and distinguishable from fiction, and authenticated by witnesses both knowing the truth and willing to declare it. Possessing this preliminary stock, he may reason from it to refute distinct falsehoods and to correct partial mistakes: but if all the original statements submitted to him contain truth (at least wherever there is truth) in a sort of chemical combination with fiction, which he has no means of decomposing,—he is in the condition of one who tries to solve a problem without data: he is first obliged to construct his own data, and from them to extract his conclusions. The statements of the epic poets, our only original witnesses in this case, correspond to the description here given. Whether the proportion of truth contained in them be smaller or greater, it is at all events unassignable,—and the constant and intimate admixture of fiction is both indisputable in itself, and, indeed, essential to the purpose and profession of those from whom the tales proceed. Of such a character are all the deposing witnesses, even where their tales agree; and it is out of a heap of such tales, not agreeing, but discrepant in a thousand ways, and without a morsel of pure authenticated truth,—that the critic is called upon to draw out a methodical series of historical events adorned with chronological dates.