It is true that until the time we have mentioned Churchmen did not greatly trouble themselves with investigations into the history of the religion they professed or the ritual they performed. But it is also true that several authors before this date enumerate the Jewish vestments, and enter at length into the figurative meanings which they were alleged to bear; but not one of these refers to any supposed genealogical connection—if the expression be permissible—between the two systems. This would be inexplicable if the Christian vestments were actually derived from the Jewish; for not only would the resemblance between the two be obvious, but the tradition of the assumption by Christian clerics of the vestments originally instituted for the Jewish priesthood would still be fresh in the minds of the authors. Yet not only do these writers not point out any resemblance between the two: they even make use of words and phrases which point to considerable differences between the outward appearance of Jewish and Christian vesture. Apart from these considerations, may we not ask with reason how the early Christians, a poor and persecuted sect, could possibly assume and maintain an elaborate and expensive system of vestments such as the Jewish? And if the assumption had been made after the days of persecution were past, surely some record of the transaction would have been preserved till our own day? We possess a tolerably full series of the acts and transactions of ecclesiastical courts in all parts of the known world from the earliest times—how is it that all record of such an important proceeding has perished? The first hint of the idea of the Mosaic origin of the Christian vestments is given by Rabanus Maurus, Archbishop of Mainz, in his treatise 'De Institutione Clericorum,'[5] written about the year 850. In the first book of this tract he discusses each Christian vestment in turn, endeavouring to find parallels to some of them among the vestments of the Jewish priesthood, but without much success. The seed thus sown, however, rapidly bore fruit among subsequent writers, who expanded the theory with great elaboration.