When Haroun Alraschid succeeded to the throne, which he did after the death of his elder brother Hadi, Isaac composed the following verses on his inauguration, and on the appointment of Yahia, the father of Jaafer (Giafar,) and the founder of the greatness of the family called the Barmecides. Th’ affrighted sun ere-while had fled, And hid his radiant face in night; A cheerless gloom the world o’erspread-- But Haroun came and all was bright. Again the sun shoots forth his rays, Nature is deck’d in Beauty’s robe; For mighty Haroun’s sceptre sways, And Yahia’s arm sustains the globe. Professor Carlyle gives the following instance of the power of music over the mind of this monarch: Haroun Alraschid having quarrelled with his mistress, Meridah, left her in a rage, and refused to see her any more. The lady was in despair, and knew not how to bring about a reconciliation. In the mean time, the vizier Jaafar, (Giafar) who had always been the friend of Meridah, sent for Almousely; and giving him a song composed for the occasion, desired him to perform it before the caliph, with all the pathos he was master of. The musician obeyed; and such were the powers he possessed, that Haroun’s anger was instantly appeased; he rushed into the presence of Meridah, and taking all the blame of the quarrel, entreated her to forgive him, and bury every thing that had passed in eternal oblivion. Ebn Khalican, the historian, adds, that both Haroun and the lady instantly rewarded the minister and musician with a considerable present.