A missing chunk of Pope Vitalian’s Letter to King Oswiu about Easter?

In Bede’s Ecclesiastical History book 3 chapter 29, he quotes a letter from Pope Vitalian to the Anglo-Saxon King Oswiu, encouraging him to adopt the new simpler Roman calculation of the date of Easter instead of the Irish method using the 89-year cycle of Victorius. “To the most excellent lord, our son Oswiu, king of the Saxons, Bishop Vitalian, servant of the servants of God. “We have received your Highness’s welcome letter. … Therefore your Highness must, as a member of Christ, always follow the holy rule of the chief of the apostles in all things, both in the celebration of Easter and in everything delivered by the holy apostles, Peter and Paul, who, like two heavenly lights, illuminate the world, while their teaching daily illuminates the hearts of believers.” After some remarks about celebrating the true Easter uniformly throughout the whole world, he goes on: “Finally, in view of the length of the journey, we are not at present able to find a man who is entirely suitable and…