In 672 Bishop Bisi was appointed Bishop of Dunwich aka East Anglia.
Bede. "In the name of our Lord God and Saviour Jesus Christ, who reigns for ever and for ever, and governs his church, it was thought meet that we should assemble, according to the custom of the venerable canons, to treat about the necessary affairs of the church. We met on the 24th day of September, the first indiction, at a place called Hertford, Hertfordshire [Map], myself, Theodore, the unworthy bishop of the see of Canterbury, appointed by the Apostolic See, our fellow-priest and most reverend brother, Bisi, bishop of the East Angles; also by his proxies, our brother and fellow-priest, Wilfrid, bishop of the nation of the Northumbrians, as also our brothers and fellow priests, Putta, bishop of the Kentish castle, called Rochester; Eleutherius, bishop of the West Saxons, and Winfrid, bishop of the province of the Mercians. When we were all met together, and were sat down in order, I said, ' I beseech you, most dear brothers, for the love and fear of our Redeemer, that we may all treat in common for our faith; to the end that whatsoever has been decreed and defined by the holy and revered fathers, may be inviolably observed by all.' This and much more I spoke tending to the preservation of the charity and unity of the church; and when I had ended my discourse, I asked every one of them in order, whether they consented to observe the things that had been formerly canonically decreed by the fathers ? To which all our fellow-priests answered, ' It so pleases us, and we will all most willingly observe with a cheerful mind whatever is laid down in the canons of the holy fathers.' I then produced the said book of canons, and publicly showed them ten chapters in the same, which I had marked in several places, because I knew them to be of the most importance to us, and entreated that they might be most particularly received by them all.
Bede. This synod was held in the year from the incarnation of our Lord 673. In which year, Egbert, king of Kent, died in the month of July; his brother Lothere succeeded him on the throne, which he had held eleven years and seven months. Bisi, the bishop of the East Angles, who is said to have been in the aforesaid synod, was successor to Boniface, before spoken of, a man of much sanctity and religion; for when Boniface died, after having been bishop seventeen years, he was by Theodore substituted in his place. Whilst he was still alive, but hindered by much sickness from administering his episcopal functions, two bishops, Ecci and Badwin, were elected and consecrated in his place; from which time to the present, that province has had two bishops.