“With this tragedy,” says an Italian biographer of Niccolini, “the poet potently touched all chords of the human heart, from the most impassioned love to the most implacable hate.... The enthusiasm rose to the greatest height, and for as many nights of the severe winter of 1830 as the tragedy was given, the theater was always thronged by the overflowing audience; the doors of the Cocomero were opened to the impatient people many hours before the spectacle began. Spectators thought themselves fortunate to secure a seat next the roof of the theater; even in the prompter's hole {Note: On the Italian stage the prompter rises from a hole in the floor behind the foot-lights, and is hidden from the audience merely by a canvas shade.} places were sought to witness the admired work.... And whilst they wept over the ill-starred love of Imelda, and all hearts palpitated in the touching situation of the drama,--where the public and the personal interests so wonderfully blended, and the vengeance of a people mingled with that of a man outraged in the most sacred affections of the heart,--Procida rose terrible as the billows of his sea, imprecating before all the wrongs of their oppressed country, in whatever servitude inflicted, by whatever aliens, among all those that had trampled, derided, and martyred her, and raising the cry of resistance which stirred the heart of all Italy. At the picture of the abject sufferings of their common country, the whole audience rose and repeated with tears of rage: “Why should heaven smile so glorious over The land of our infamous woe?” By the year 1837 had begun the singular illusion of the Italians, that their freedom and unity were to be accomplished through a liberal and patriotic Pope. Niccolini, however, never was cheated by it, though he was very much disgusted, and he retired, not only from the political agitation, but almost from the world. He was seldom seen upon the street, but to those who had access to him he did not fail to express all the contempt and distrust he felt. “A liberal Pope! a liberal Pope!” he said, with a scornful enjoyment of that contradiction in terms. He was thoroughly Florentine and Tuscan in his anti-papal spirit, and he was faithful in it to the tradition of Dante, Petrarch, Machiavelli, Guicciardini, and Alfieri, who all doubted and combated the papal influence as necessarily fatal to Italian hopes. In 1843 he published his great and principal tragedy, _Arnaldo da Brescia_, which was a response to the ideas of the papal school of patriots. In due time Pius IX. justified Niccolini, and all others that distrusted him, by turning his back upon the revolution, which belief in him, more than anything else, had excited. The tragedies which succeeded the Arnaldo were the _Filippo Strozzi_, published in 1847; the _Beatrice_ _Cenci_, a version from the English of Shelley, and the _Mario e i Cimbri_.