Jocelin seems to have altered parts of the original life that he did not understand; while adding others, like the trip to Rome, that served his own purposes, largely the promotion of the Bishopric of Glasgow. Some new parts may have been collected from genuine local stories, particularly those of Mungo's work in Cumbria. S. Mundahl-Harris has shown that Mungo's associations with St Asaph were a Norman invention. However, in Scotland, excavations at Hoddom have brought confirmation of early Christian activity there, uncovering a late 6th-century stone baptistery.