Machiavelli is as undoubtedly the first prose writer of the age as Ariosto is the first poet, Second to him as an historian, though at a wide interval, we may place his friend and fellow-townsman, FRANCESCO GUICCIARDINI, born in 1480, died in 1540. He studied law to such good purpose at Florence, Ferrara and Padua, that at the early age of twenty-two he was chosen to lecture on the Institutes of Justinian, and at the age of thirty-one he was sent as Ambassador to Ferdinand of Aragon, which post he occupied for two years. With the help of that King, Julius the Second forced the Florentines to submit again to the rule of the Medici family. Guicciardini was suspected by the friends of liberty of having a hand in the negotiations between the Pope and the King, and of being a tool of that ambitious dynasty. Such, in truth, he proved himself; and harshness, rancour, and vindictiveness characterised his conduct towards his political opponents. When Leo X visited Florence in 1515, Guicciardini was sent by the Republic to receive him at Cortona. No circumstance could have proved more favourable to the historian's career. Leo X looked upon him with the utmost favour, and nominated him to high and important offices, which his successor, Adrian VI, continued, and to which Clement VII subsequently added others. When the "Holy League," headed by the Duke of Urbino, was formed against the Emperor Charles V, Guicciardini was one of its leading spirits. But the Imperial arms prevailed; Clement VII had to take refuge in the Castle of St. Angelo, and had the agony of seeing Rome stormed and plundered under his very eyes. Atrocious were the cruelties committed. St. Peter's itself was stained with the blood of the slaughtered. Huge contributions were levied on the citizens, and an enormous ransom exacted from the Pope. Seeing Clement, himself a Medici, deprived of liberty and even in danger of his life, the Florentines took to arms and expelled the obnoxious dynasty. But the unexpected happened. The injured Pope and the tyrannical Emperor became reconciled; and probably to atone for the atrocities committed by his forces, Charles V lent effective aid to Alexander de Medici in his endeavour to regain his lost dominion over Florence. Guicciardini became the instrument of Alexander, a cruel and relentless tyrant, who was subsequently assassinated by his kinsman Lorenzino. Guicciardini was an active agent in the election of Cosimo I, and when he was reproached for imposing another tyrant on his country, he answered that the more princes were assassinated, the more would arise. But Cosimo was ungrateful when Guicciardini demanded the reward of his services; bitter disappointment was in store for him; he withdrew from public affairs, and lived in retirement at Arcetri, where he died.