This poem, at any rate in Jones's later revisions, is considered to be a masterpiece. In 1922 John Jay Parry called it "without a doubt the best thing the Welsh have produced on King Arthur in modern times, and...worthy to rank with the best in any language". It is often said to be the most important poem of the early 20th-century Welsh literary revival. Critics have particularly praised its elegance of language and brilliance of style, its avoidance of speechifying and philosophical disquisition, and, as compared with Tennyson's "The Passing of Arthur", its superior structure, dramatic qualities, and pace. It is, said
Idris Bell, "a model of terse, nervous narration, and of exquisite verse". The poem's themes are richly ambiguous and complex. Jones's narrative poems,
Ymadawiad Arthur among them, are above all defences of the traditional, ancient values of his people in an age of increasing philistinism, materialism and industrial capitalism. In this he is comparable to earlier writers such as
John Ruskin and
William Morris. During the 19th century, it was falsely claimed that there was little Welsh interest in King Arthur, but in
Ymadawiad Arthur he is reclaimed as a specifically Welsh representation of the fortune of Britain, while Bedwyr stands for the beleaguered Welsh nation. Jones's Arthur, according to
Jerry Hunter, represents faith in the spirit of the Welsh nation's ability to resurrect itself and overcome the fragmentation of modern society. M. Wynn Thomas suggests that Arthur represents on the one hand "all the hope and all the excitement of
Welsh nationalism", with particular reference to the figures of
T. E. Ellis and
David Lloyd George, and on the other hand the sense of disappointment that accompanied the collapse of the nationalist
Cymru Fydd movement. William Beynon Davies sees Biblical parallels in the poem, with Arthur resembling in some ways the
Messiah and in others the
Suffering Servant. According to Hywel Teifi Edwards,
Ymadawiad Arthur "brought back some of the
mythopoeic grandeur which John Morris-Jones yearned for. More than that, he made of Bedwyr, the knight charged by Arthur to throw the great sword Excalibur into the lake, a prototype of the twentieth-century Welshman who, from generation to generation, armed only with a vision of his culture's worth, fights for its survival against an all-devouring materialism. Bedwyr, agonizing over the catastrophe which he feared would befall his defenseless country should he obey Arthur's command, is one of the most deeply moving figures in Welsh literature. Denied the security of a matchless weapon, the last tangible proof of Arthur's supernatural strength, he must fight on with only his faith in Arthur's promised return from Afalon to sustain him." == Musical settings ==