[36.] Dún Sobairchi and Dún Cermna are, according to tradition, the oldest stone forts in Ireland, having been built by Sobairche and Cermna, who divided Ireland between them, about 1500 B.C., the former placing his dún in the extreme north, the latter in the extreme south on the Old Head of Kinsale.
[37.] Slíab Cua (or, by eclipse after the neuter slíab, Gúa), 'the hollow mountain,' or 'mountain of hollows' (cúa = Lat. cavus), the native name for the Knockmealdown mountains on the borders of Tipperary and Waterford.
[42.] Dercc Ferna was demolished by the Norse in 930. Hennessy, in a note on the entry in the AU., says that it is supposed to be the cave of Dunmore, not far from the city of Kilkenny, but adds "apparently on insufficient evidence."
[44.] i. ionadha dona no nemhchonáig. Here we get the only gloss in L. Bangor is said to be unlucky, "because of its having been destroyed so often." It was frequently plundered by the Norse during the ninth century. As to the kingship of Mugdorn Maigen (now Cremorne barony, Co. Monaghan), it certainly was an ill-fated dynasty. Of the sixteen kings of this tribe who are mentioned in the Annals of Ulster, ten were put to death, of whom one (Suibne) was slain by his own brothers, while two brothers, Gilla Ciaráin and Máelmúaid, were slain within the same year (1020), the latter after having been king for but one day.
[45.] Beyond the fact that the three tribes here mentioned belonged to the aithech-thuatha or rent-paying tribes, I know nothing to throw light on the triad.
[51.] In Harl. 5280, p. 75a, marg. inf., Druimm nDrobeoil is said to derive its name from a horse called Drobel. (Ech Dedad. i. Drobel a ainm diatá Druim nDrobeoil.)
[56.] Here H. has the absurd etymological gloss futhairbhe .i. fothirbhe .i. tír mhaith na mbeo, nó ferann maith.
[60.] Léim Congcoluinn i gcondae in Chláir.
[64.] .i. miodhchonách duine. Suighe cumhang .i. deireoil.
[65.] iarmar cléithe .i. salchar na cléithe d'fágbhail a bferann. drithlennach .i. ferthain anuas nó linn thríd.