London, British Library, MS Cotton Vitellius C ix
Russell, Paul [ed. and tr.], Vita Griffini filii Conani: the medieval Latin life of Gruffudd ap Cynan, Cardiff: University of Wales Press, 2005.
The orthography of the Welsh names in Vita Griffini filii Conani; Names of countries and nationalities in Vita Griffini filii Conani; The fair copy in BL, Cotton MS, Vitellius C.ix.
Evans, J. Gwenogvryn, Report on manuscripts in the Welsh language, vol. 2:4: The British Museum, Historical Manuscripts Commission, London, 1910.
1022 “MS 28”