sentences:  With the Gregorian missionaries, a third strand of Christian practice was added to the British Isles, to combine with the Gaulish and the Hiberno-British strands already present.The Gregorian missionaries had little lasting influence in Northumbria, where after Edwin's death the conversion of the Northumbrians was achieved by missionaries from Iona, not Canterbury.Felix of Burgundy may have studied at one of the monasteries founded by Columbanus.