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Rh to the brethren at Lyons, urging them both to avoid the errours of the Spanish Bishop and also any interpolation of the creed. "Beloved brethren," he says, "look well to the sects of the Spanish errour; follow in the faith the steps of the holy Fathers, and remain attached to the holy Church Universal in a most holy unity. It has been written,  'Do not overstep the limits laid down by the Fathers; insert nothing new in the creed of the Catholic faith, and in religious functions be not pleased with traditions unknown to ancient times.'"

This letter was written in 804. It thus appears that at the beginning of the ninth century the addition was already condemned in France by the most learned and pious men. Alcuin also censured, as we see, the usage that was beginning to prevail of chaunting the creed in the service instead of reciting it.

The interpolation in the creed had, nevertheless, some advocates, who, five years later, proposed, in a council at Aix-la-Chapelle, to solemnly authorize the Filioque. They met with opposition, and it was decided to refer the question to Rome. Leo III. was then Pope. He compromised the matter. Without positively rejecting the doctrine of the procession from the Father and from the Son, he censured the addition made to the creed. He even saw fit to transmit to posterity his protest against any innovation, by having the creed engraved upon two tablets of silver that were hung in St. Peter's Church, and under which was written the following inscription: "I, Leo, have put up these tablets for the love and preservation of the orthodox faith." The deputies from the Council of Aix-la-Chapelle had needed all the resources of their logic and erudition to persuade Leo III. that this doctrine of the procession of the Holy Ghost might be Catholic. Their erudition was inaccu-