[2] He subsequently joined the monastery as a monk,[3] and became one of five men educated at Whitby who went on to become bishops.
[5] Bosa was appointed to the now greatly reduced diocese of York,[2] which included the sub-kingdom of Deira,[3] thanks to the support of King Ecgfrith of Northumbria and Theodore of Tarsus, the Archbishop of Canterbury.
[10] A contemporary writer, Bede, praised Bosa as a man of "singular merit and sanctity".
[12] Bosa was also responsible for the early education of Acca, later Bishop of Hexham, who grew up in his household.
[14] The 16th-century English antiquary John Leland included Bosa in his list of saint's resting places in England, giving it as York.