>>> Losccadh longport Brīain bodeas
>>> le cloinn Conaill go ccnes nglan,
>>> ar nert cloidhem is scīath gil
>>> do dīghail Tadg sin rē samh.
Dennis King wrote:
>= OI "fo dess", Mod. "ó dheas" = to the south
With that bit of help, I feel more confident translating 'losccadh' as
preterite singular passive -- 'Brian's stronghold to the south was burned'.