Summary: Written probably in 1760 or 1761 when Gray was living in London. Based on a Latin translation by Evan Evans of the original Welsh "Arwyain Owain Gwynnedd" by Gwalchmai ap Meilyr. First published in Poems (1768).
References: Parks, Stephen et al. (ed.), Osborn Collection First-Line Index. New Haven: Beinecke Library, Yale University, 2005, 624, item O1156; Nelson (ed.), Union First Line Index. Mar. 2010. Folger Shakespeare Library. 16 April 2010. <http://firstlines.folger.edu/detail.php?id=10633>
Contents: Transcript in the hand of John Freeman Milward Dovaston, entitled "The triumphs of Owen Gwynedd a fragment", in his autograph Select, and Miscellaneous Poems, Scraps, Mottos &c, 1773 and later, a Commonplace book of verse by Dovaston and others.