Detholiad o waith Gruffudd Ab Ieuan Ab Llewelyn Vychan / a gasglwyd o wahanol ysgriflyfrau yn y British Museum, gan J.C. Morrice.Gruffudd Ab Ieuan Ab Llewelyn Vychan.1910CY
Dosparth Edeyrn Davod Aur; or, The ancient Welsh grammar, which was compiled by royal command in the thirteenth century by Edeyrn the Golden tongued, to which is added Y pum llyfr kerddwriaeth, or The rules of Welsh poetry, originally compiled by Davydd Ddu Athraw, in the fourteenth, and subsequently enlarged by Simwnt Vychan, in the sixteenth centry: with English translations and notesEdeyrn, Davod Aur, fl1856CY