He passed several years thus almost cut off from society: his books were his great resource; he was never without one in his hand. He relates in a letter, how, as a playful experiment, a friend locked up his library, intending to exclude him from it for three days; but the poet's misery caused him to restore the key on the first evening:--"And I verily believe I should have become insane," Petrarch writes, "if my mind had been longer deprived of its necessary nourishment." The friend who thus played with his passion for reading, was Philip de Cabassoles, bishop of Cavaillon. Cavaillon is a pretty but insignificant town, situated on the slope of a mountain near the Durance, twelve miles distant from Avignon, and six from Vaucluse. He became intimate with Petrarch here, and they cemented a friendship which lasted his life. Sometimes Petrarch visited Cabassoles at Cabrières, where he resided; often the bishop came to the poet's cottage. They frequently passed the livelong day together in the woods, without thinking of refreshment, or whole nights among their books, when morning often dawned upon them unawares. After two years' residence in this seclusion, Petrarch continued so pleased with it, that he wrote to Giacomo Colonna, who had endeavoured, by promises of preferment and advantage, to entice him from it, imploring him to let him remain in a position so congenial to his disposition. "You know," he says, "how false and vain are the enticements of a court; and that the men most in favour there are the fools and rogues who attain dignities and places through adulation and simony. Why, then, should you, a man of honour, desire that I should return to a court? And even if it were possible that I should obtain any thing from the munificence of the pope, the detestable vices of the court are horrible to me. When I quitted the papal residence, know that I sang the psalm 'In exitu Israel ex Ægypto.' I enjoy, in the delightful solitude of Vaucluse, a sweet and imperturbable tranquillity, and the placid and blameless leisure of study. Any spare time I may have I go to Cabrières to amuse myself. Ah! if you were permitted to take up your abode in this valley, you would assuredly be disgusted, not only with the pope and cardinals, but the whole world. I am firmly resolved never to behold the court again."