Ffeil 4/4. - Brut y Tywysogion (ed. John Williams ab Ithel),

A copy of the Rolls Series edition of Brut y Tywysogion (ed. John Williams ab Ithel, 1860), with corrections by Dr J. Gwenogvryn Evans. The copy appears to have been used by the Oxford University Press in the setting up of The Text of the Bruts from the Red Book of Hergest (ed. John Rhs and J. Gwenogvryn Evans; Oxford, 1890).