The Voyage of Bran: Appendix: VIII. Irische Texte iii. p. 87
'In Bangor
[10] Is Mongán son of Fiachna:
With him is Conchobur
At the contest of shield-splitting.'
Quoted as an example of the metre called ae freslíge becc. Is leis is Stokes' conjecture for isle of the isle of the MS.