For twelve years Tasso remained at Ferrara, constantly writing sonnets and short poems of all descriptions, which were most often addressed to Leonora, but at the same time he was busily working upon that longer poem in epic form, descriptive of the First Crusade, the _Gerusalemme liberata_, wherein he puts a new feeling into Italian poetry, which had been expressed before by Ariosto in his amatory verse, but which cannot be found to any great extent in his more pretentious work, the _Orlando Furioso_. This new feeling was real sentiment, and not sentimentality, and it denotes the growing conception of the worth and dignity of womanhood which we have already discovered in the poetry of Michael Angelo. Allowing for the infinite contradictions possible in human nature, it may be that these men of the same time, who so coolly killed their wives and sisters for acts of infidelity, were touched in some dim way with the same feeling, to which, alas! they gave but sorry expression, if the surmise be true. The constant excitement of the court and his unending literary labors commenced to tell upon the poet in 1575, when his health began to fail and he grew irritable and restless, became subject to delusions, fancied that he had been denounced by the Inquisition, and was in daily terror of being poisoned. Then it was said that the poet was mad, and there are some who have whispered that it was his unrequited love for the Princess Leonora which brought about this calamity. However that may be, the climax was reached in the year 1577, when Tasso, in the presence of Lucrezia d'Este,--who was then Duchess of Urbino,--drew a knife upon one of his servants. For this he was arrested, but soon after was given his liberty on condition that he should go to a Franciscan monastery and give himself that rest and attention which his failing health demanded. Here, however, he was beset with the idea that the duke sought to take his life, and he fled in disguise to his sister, who was then living at Sorrento. Various explanations have been given for this sudden flight, and some biographers have insinuated that the duke had discovered some hidden intrigue between his sister Leonora and Tasso which had caused the latter to fear for his safety. This supposition cannot be accepted as true, however, for if the duke had known or had even strongly suspected such a thing he would have promptly put the poet to death without compunction, and such a course of action would have been entirely justified by the public sentiment of the time. And if this supposition were true, is it probable that Tasso would have been allowed to return to Ferrara in a short time, as he did? Now, begins a confused life, and the poet comes and goes, moved by a strange restlessness, never happy away from Ferrara, yet never caring to stay there long. Finally, on one occasion he thought himself so neglected at his return that he made a most violent scene, and became so bitter and incoherent