See p. 225.
He is mentioned by Gildas, along with Julius and Aaron of Caerleon. These last were already locally canonized in the 9th century, as the 'Liber Landavensis' testifies; and the sites of their respective churches could still be traced, according to Bishop Godwin, in the 17th century.
Eborius of York, Restitutus of London, and Adelfius of "Colonia Londinensium." The last word is an obvious misreading. Haddan and Stubbs ('Concilia,' p. 7) suggest Legionensium, i.e. Caerleon.