Note 4 — Chapter XII
Reading edition
My impression is that the "king of Britain" was a bit of a myth, and that the "Lucius" venerated at Chur was Saint Lucius of Glamorgan—called in Welsh "Lleurwg" or "Lleurfer Mawr"=the "Great Light-bearer," who, according to the Welsh tradition, was the founder of the Church of Llandaff and of others in South Wales.