Other Talmudists of the tenth century are known, but rabbinical literature may be said to have commenced only with Gershom ben Judah (about 960-1028). According to tradition his master was his contemporary Hai Gaon; in reality he was the disciple of Judah ben Meir ha-Cohen, surnamed Leontin (about 975). Originally from Metz, Gershom established himself at Mayence, to which a large number of pupils from neighboring countries soon flocked in order to attend his school. Thus he was the legatee of the Babylonian academies, the decay of which became daily more marked. In his capacity as head of a school as in many other respects, he was the true forerunner of Rashi, who carried on his work with greater command of the subject and with more success. Rabbenu Gershom not only gave Talmudic learning a fresh impetus and removed its centre [center sic] to the banks of the Rhine, but he also exerted the greatest and most salutary influence upon the social life of his co-religionists, through his "Decrees," religious and moral, which, partly renewing older institutions, were accepted by all the Jews of Christian countries. Among other things, he forbade polygamy. He merits consideration in two aspects, as a Gaon and as one to whom his disciples gave the surname which still attaches to him, "the Light of the Exile," <I>Meor ha-Golah.</I> Rashi said of him: "Rabbenu Gershom has enlightened the eyes of the Captivity; for we all live by his instruction; all the Jews of these countries call themselves the disciples of his disciples." Gershom seems to have been the first Rhenish scholar who resorted to the written word for the spread of his teachings. He devoted himself to the establishment of a correct text of the Bible and the Talmud, and his chief work is a Talmudical commentary. Since his time the continuity of learning has been uninterrupted. The seed sown by Rabbenu Gershom was not long in germinating. Schools began to multiply and develop in Lorraine. The one at Mayence prospered for a long time, and was eclipsed only by the schools of Champagne. A rabbi, Machir, the brother of Gershom, by his Talmudic lexicon contributed likewise to the development of rabbinical knowledge. His four sons were renowned scholars, contemporaries and doubtless fellow-students of Rashi. The disciples of Gershom, who continued the work of their master, are of especial interest to us, because one of them, Simon the Elder, was the maternal uncle of Rashi, and three others were his masters. These were Jacob ben Yakar, Isaac ha-Levi, and Isaac ben Judah. The latter two were disciples also of Eliezer ben Isaac the Great, of Mayence. Jacob ben Yakar and Isaac ha-Levi went to Worms, where they became rabbis, while Isaac ben Judah remained at Mayence, and directed the Talmudic school there.