Evan Davies ('Myvyr Morganwg'): Hynafiaeth Aruthrol Trwn, neu Orsedd Beirdd Ynys Brydain a'i Barddas Gyfrin ... (Pontypridd, [1875]). Attached to the upper and lower end-papers are brief notes on 'Myvyr Morganwg' by Henri Gaidoz [see 561]; a list by Llywarch Reynolds, Merthyr Tudful, of the published works of 'Myvyr Morganwg'; and a holograph letter from Llywarch Reynolds to Henri Gaidoz, 1880 (relating largely to the life and writings of 'Myvyr Morganwg').