When Nizam became Vizier his schoolmates appeared. Hassan was given a lucrative office at court, but soon became involved in palace intrigues and was forced to flee. He afterward became the head of the Ismailians, a sect of fanatics, and his castle in the mountains south of the Caspian gave him the name which all Christians dreaded. His emissaries, sent out to slay his enemies, became known as Assassins. Omar made no demand for office of his old friend, but begged permission to live in "a corner under the shadow of your fortune." So the Vizier gave him a yearly pension, and Omar devoted his remaining years to the study of astronomy, in which he became very proficient, and which earned him many favors from the Sultan. Omar became widely celebrated for his scientific knowledge and his skill in mathematics, and he formed one of the commission that revised the Persian calendar. His heretical opinions, shown in the _Ruba'iyat_, gained him many enemies among the strict believers, and especially among the sect of the Sufis, whose faith he ridiculed. But the poet was too well hedged about by royal favor for these religious fanatics to reach him. So Omar ended his life in the scholarly seclusion which he loved, and the only touch of romance in his career is furnished by the provision in his will that his tomb should be in a spot where the north wind might scatter roses over it. One of his disciples relates that years after Omar's death he visited Naishapur and went to his beloved master's tomb. "Lo," he says, "it was just outside a garden, and trees laden with fruit stretched their boughs over the garden wall and dropped their flowers upon his tomb, so that the stone was hidden under them." Edward FitzGerald, the translator, who made Omar known to the western world, and especially to English-speaking readers, was one of the quaintest Englishmen of genius that the Victorian age produced. A college chum of men like Tennyson, Thackeray and Bishop Donne, he so impressed these youthful friends with his rare ability and his engaging personal qualities that they remained his warm admirers throughout life. Apparently without ambition, FitzGerald studied the Greek and Latin classics and made several noteworthy translations in verse, which he printed only for private circulation. Through a friend, Professor Cowell, a profound Oriental scholar, FitzGerald mastered Persian, and it was Cowell who first directed his attention to Omar's _Ruba'iyat_, then little known even to scholars.