oratory.  Amid the universal corruption of public morals, from the depth of sloth and servitude, when the reality of liberty was lost, when fate and fortune had combined to render constitutional reconstruction impossible for the shattered republics of Italy, the intellect of the Florentines displayed itself with more than its old vigor in a series of the most brilliant political writers who have ever illustrated one short but eventful period in the life of a single nation.  That period is marked by the years 1494 and 1537.  It embraces the two final efforts of the Florentines to shake off the Medicean yoke, the disastrous siege at the end of which they fell a prey to the selfishness of their own party-leaders, the persecution of Savonarola by Pope Alexander, the Church-rule of Popes Leo and Clement, the extinction of the elder branch of the Medici in its two bastards (Ippolito, poisoned by his brother Alessandro, and Alessandro poignarded by his cousin Lorenzino), and the final eclipse of liberty beneath the Spain-appointed dynasty of the younger Medicean line in Duke Cosimo.  The names of the historians of this period are Niccolo Machiavelli, Jacopo Nardi, Francesco Guicciardini, Filippo Nerli, Donato Giannotti, Benedetto Varchi, Bernardo Segni, and Jacopo Pitti.[1] In these men the mental qualities which we admire in the Villani, Dante, and Compagni reappear, combined, indeed, in different proportions, tempered with the new philosophy and scholarship of the Renaissance, and permeated with quite another morality.  In the interval of two centuries freedom has been lost.  It is only the desire for freedom that survives.  But that, after the apathy of the fifteenth century, is still a passion.  The rectitude of instinct and the intense convictions of the earlier age have been exchanged for a scientific clairvoyance, a ’stoic-epicurean acceptance’ of the facts of vitiated civilization, which in men like Guicciardini and Machiavelli is absolutely appalling.  Nearly all the authors of this period bear a double face.  They write one set of memoirs for the public, and another set for their own delectation.  In their inmost souls they burn with the zeal for liberty:  yet they sell their abilities to the highest bidder—­to Popes whom they despise, and to Dukes whom they revile in private.  What makes the literary labors of these historians doubly interesting is that they were carried on for the most part independently; for though they lived at the same time, and in some cases held familiar conversation with each other, they gave expression to different shades of political opinion, and their histories remained in manuscript till some time after their death.[2] The student of the Renaissance has, therefore the advantage of comparing and confronting a whole band of independent witnesses to the same events.  Beside their own deliberate criticism of the drama in which all played some part as actors or spectators, we can use the not less important testimony they afford unconsciously, according to the bias of private or political interest by which they are severally swayed.