File Llanstephan MS 43 [RESTRICTED ACCESS]. - Flyting poetry,

A manuscript containing flyting poetry exchanged between Archdeacon Edmwnd Prys and Wiliam Cynwal. Following the death of Wiliam Cynwal, Edmwnd Prys breaks off the exchange and composes an elegy to his erstwhile poetic rival (p. 177). Another elegy by Edmwnd Prys, to Siôn Phylip, occurs on p. 187. Richard Morris indexed the manuscript for W. Jones, Armiger, R.S.S., London, 1747 (see pp. iii-v). At p. 124 there is a copy of a letter from Edmwnd Prys to Wiliam Cynwal which refers to nine cywyddau of Wiliam Cynwal, of which a note on p. 93 of Peniarth MS 125 informs us the ninth was lost.
The extensive explanatory marginalia accompanying the compositions of Edmwnd Prys, coupled with the fact that the elegy to Siôn Phylip was evidently once folded and carried in the pocket, suggests that this manuscript may be a holograph once belonging to Edmwnd Prys. Much of the text of this manuscript, or one of the same archetype, was transcribed into Peniarth MS 125, though Peniarth MS 49 has four additional lines following 'Dôd i ddôl dedwdd Wiliam ...'.