Who are You Mar Zutra

In the COMMENTS section of the journal, under the title On the Quality of the Text of "Iggeret Rav Sherira Gaon", Harry Fox brings new proofs from chronicles that attest to his being the head of the yeshiva in Pumbedita, and additional proofs that he was the exilarch. Furthermore, it should be noted that an examination of Bavli manuscripts also points to his having been referred to by both titles - Mar and Rav. Fox also discusses the importance of examining chronicles that supplement and that oppose Iggeret Rav Sherira Gaon, such as Seder Tannaim v’Amoraim.