Another circumstance influenced Petrarch in this choice. Not long before, his friend Dionisio Robertis had visited him at Vaucluse on his way to the court of Robert king of Naples. From him Petrarch heard of the literary tastes and liberal disposition of this amiable monarch. He had already meditated a visit to him, and letters had been interchanged between them. The circumstance of his coronation gave him a fair excuse for paying him a visit. In the ardour of an age scarcely yet mature; he believed himself worthy of the honour conferred on him; but he tells us that he felt ashamed of relying only on his own testimony and that of the persons who invited him. Perhaps the desire of display, and of proving to the world that he was no illiterate pretender, was the stronger motive. However this might be; he made choice of the king of Naples; more illustrious in his eyes for his learning than his crown, to examine his claim to distinction, and be the judge of his deserts.[43] [Sidenote: 1341. Ætat. 37.] He lost no time in repairing to the court of king Robert, who received him with a warmth of friendship that excited his deepest gratitude. Hearing the object of the poet's visit, he expressed great delight, and considered the choice made of him, among all mortals, to be the judge of his merits, as glorious to himself. During the many conversations they held together, Petrarch showed the monarch the commencement of his poem on Africa. Robert, highly delighted, begged that it might be dedicated to him: the poet gladly assented, and kept his promise, though the king died before it could be fulfilled. The examination of his acquirements lasted three days, after which the king declared him worthy of the laurel, and sent an ambassador to be present on his part when the crown was conferred. [Sidenote: April 17. 1341.] Petrarch repaired to Rome for the ceremony, and was crowned in the capitol with great solemnity, in presence of all the nobles and high-born ladies of the city. "I then," writes Petrarch, "thought myself worthy of the honour: love and enthusiasm bore me on. But the laurel did not increase my knowledge, while it gave birth to envy in the hearts of many."[44] Leaving Rome soon after his coronation, Petrarch intended to return to Avignon, but passing t through Parma he was detained by his friend Azzo Correggio, who ruled the city, governing it with incomparable wisdom and moderation. The friendship between Azzo and Petrarch had commenced at Avignon, where, for the first and only time, Petrarch had been induced to take on himself the office of a barrister, and pleaded the cause of the Correggii against their enemies the Rossi before the pope, and succeeded in obtaining a decision in their favour. This, as is mentioned, is the only occasion on which Petrarch played the advocate; and he boasts of having gained the cause for his clients without using towards their adversaries the language of derision and sarcasm.