Neither of them is found in any very early MS., but their subject-matter certainly goes back to very primitive times.
_The Secret of Labra_ is taken from Keating's FORUS FEASA AR EIRINN, edited with translation by the Rev.P.S.Dineen for the Irish Texts Society, vol.i.p.

172.
_The Carving of mac Datho's Boar_.

This is a clean, fierce, fighting story, notable both for its intensely dramatic _denouement_, and for the complete absence from it of the magical or supernatural element which is so common a feature in Gaelic tales.

It has been edited and translated from one MS.

by Dr Kuno Meyer, in _Hibernica Minora_ (ANECDOTA OXONIENSIA), 1894, and translated from THE BOOK OF LEINSTER (twelfth century) in Leahy's HEROIC ROMANCES.
_The Vengeance of Mesgedra_.