An incomplete copy of Rhys Jones, Gorchestion Beirdd Cymru ... (Amwythig, 1773), lacking title-page, some preliminaries, and pp. 265-300 of the text. Y Rhagymadrodd (ff. vii-ixv) is a page-proof copy bearing emendations, possibly in Rhys Jones's hand. A mock title-page (f. v) and the missing text (pp. 265-99) have been supplied by Peter Bailey Williams (1763-1836), antiquary, together with additional poems by Guto'r Glyn, Hywel ap Dafydd ab Ieuan ap Rhys, Syr Lewis Meudwy, Owain Gwynedd, Syr Phylip Emlyn, Roger Kyffin, and William Llŷn (pp. 301-426), annotations to the text, and other items. Items found loose in the volume have been tipped in at the end and include Enwau ac ychydig o hanes rhai Beirdd gorchestol probably in the hand of the Reverend David Ellis (1736-1795), Cricieth (pp. 439-49).