↑Campbell 1860, I, 24, "The sword of light is common in Gaelic stories;.." etc.
↑"the Divine Hero overcomes his father the Otherworld-god with that god's own weapon, the thunderolt, known variously in story-telling by names such as the Gaí Bulga (Cú Chulainn's weapon), the Caladbolg (Arthur's Escalibur), or the Claidheamh Soluis of our halfpenny postage-stamps." G.M., review of O'Rahilly 1946(EIHM), in: Studies, an Irish Quarterly Review; Vol. 35, No. 139 (Sep. 1946), pp. 420-422 JSTOR p.421