Edward the First was one of the most extraordinary princes that ever sat on a throne. He revived the study of the Roman civil law with such success as to have merited the title of the English Justinian. He was no less distinguished as the patron of arts and letters. He invited to England Guido dalla Colonna, the author of the Troy Book, and Raymond Lulli. This latter was believed in his time to have prosecuted his studies with such success as to have discovered the _elixir vitae_, by means of which he could keep off the assaults of old age, at least for centuries, and the philosopher's stone. He is affirmed by these means to have supplied to Edward the First six millions of money, to enable him to carry on war against the Turks. But he was not only indefatigable in the pursuit of natural science. He was also seized with an invincible desire to convert the Mahometans to the Christian faith. For this purpose he entered earnestly upon the study of the Oriental languages. He endeavoured to prevail on different princes of Europe to concur in his plan, and to erect colleges for the purpose, but without success. He at length set out alone upon his enterprise, but met with small encouragement. He penetrated into Africa and Asia. He made few converts, and was with difficulty suffered to depart, under a solemn injunction that he should not return. But Lulli chose to obey God rather than man, and ventured a second time. The Mahometans became exasperated with his obstinacy, and are said to have stoned him to death at the age of eighty years. His body was however transported to his native place; and miracles are reported to have been worked at his tomb. [182]