Claidheamh Soluis is "a symbol of Ireland attributed in oral tradition to Cúchulainn" (James Mackillop), although none of the tales listed above name Cuchulainn as protagonist. T. F. O'Rahilly only went as far as to suggests that the "sword of light" in folk tales was a vestige of divine weapons and heroic weapons, such as Cúchulainn's shining sword Cruaidín Catutchenn, whose name means ‘the Hard-headed Steeling’. This sword (aka "Socht's sword") is said to have "shone at night like a candle" according to a version of Echtrae Cormaic ("Adventures of Cormac mac Airt"). T. F. O'Rahilly's schema, roughly speaking, the primeval divine weapon was a fiery and bright lightning weapon, most often conceived of as a throwing spear; in later traditions, the wielder would change from god to hero, and spear tended to be replaced by sword. From the heroic cycles, some prominent examples are Fergus Mac Roigh's sword Caladbolg and Mac Cecht's spear. But Caladbolg does not manifest as a blazing sword, and the latter which does emit fiery sparks is a spear, thus failing to fit the profile of a sword which shines. One example which does fit, is Cúchulainn's sword Cruaidín Catutchenn which was aforementioned. And the legacy of these mythological and heroic weapons (Lug's lighting-weapon, his "son" Cúchulainn's remarkable sword, etc. ) survive in the "sword of light" in folklore. Connection to Arthuriana A broad sweeping parallel has been made between the light or lightning weapons of Celtic tradition and King Arthur's Excalibur, described as brightly shining in several places of the Vulgate cycle Roman de Merlin. Similar passages obviously occur in Thomas Malory's Le Morte d'Arthur, which uses this as a source. Wounding by one's own sword A more precise parallel which has been argued is that just as the sword of light in Irish and Scottish folktales contain a "(fatal) wounding by one's own sword" motif, the Arthurian cycle contains an episode where Arthur is imperiled by his own sword, Excalibur. In the Huth Merlin, Morgan le Fay plots to have Arthur killed with his own Excalibur, by stealing the sword for her lover Accalon, who unbeknownst fights his lord King Arthur with it. The Lady of the Lake intercedes at the right moment to prevent Arthur's death. The episode has been copied by Malory as well (with the knight being called Accolon unlike the French original) Sleeping giant Dáithí Ó hÓgáin deduces that