Note 205 — Chapter III · THE MONASTIC CHURCH IN IONA.
Reading edition
This appears to be the best solution of the discrepancy between the statements of Adamnan and Bede. Adamnan and all the Irish authorities place the arrival of Saint Columba in Britain in 563, but Bede distinctly places it in 565. Adamnan states that he lived thirty-four years in the island, while Bede says that he died at the age of seventy-seven, having preached in Britain thirty-two years. Bede, however, connects his mission entirely with the Picts, and places it in the ninth year of King Brude. The one, therefore, probably dates from the arrival in Iona, the other from the conversion of Brude.