Translation according to P. W. Joyce:
Kilnalappa in Galway; Coill-na-leaptha, wood of the bed, i.e. a grave. See Leaba, vol. i. p. 340 [reproduced below].
These sepulchres are sometimes called leaba or leabaidh, old Irish lebaid [labba, labby], Manx lhiabbee; the word literally signifies a bed, but it is applied in a secondary sense to a grave, both in the present spoken language and in old writings. For example, in the ancient authority cited by Petrie (R. Towers, p. 350), it is stated that the great poet Rumann, who died in the year 747 at Rahan in King's County, "was buried in the same leabaidh with Ua Suanaigh, for his great honour with God and man". There is a fine sepulchral monument of this kind, hitherto unnoticed, in a mountain glen over Mount Russell near Charleville, on the borders of the counties of Limerick and Cork, which the peasantry call Labba-Iscur, Oscur's grave. O'Brien (Dict. voce Leaba) says, "Leaba is the name of several places in Ireland, which are by the common people called Leabthacha-na-bhfeinne [Labbaha-na-veana], the monuments of the Fenii or old Irish champions"; and it may be remarked that Oscur was one of the most renowned of these, being the son of Oisin, the son of Finn mac Cumhal (see p. 91, supra). Labby, which is one of the modern forms of this term, is the name of a townland in Londonderry. Sometimes the word is followed by a personal name, which is probably that of the individual buried in the monument; as in Labbyeslin near Mohill in Leitrim, the tomb of Eslin; Labasheeda in Clare, Sioda or Sheedy's grave. Sioda is the common Irish word for silk; and accordingly many families, whose real ancestral name is Sheedy, now call themselves Silk. In case of Labasheeda, the inhabitants believe that it was so called from the beautiful smooth strand in the little bay - Leaba sioda, silken bed, like the "Velvet strand" near Malahide. Perhaps they are right. Cromlechs are called in many parts of the country Leaba-Dhiarmada-agus Grainne, the bed of Diarmaid and Grainne; and this name is connected with the well-known legend, that Diarmait O'Duibhne [Dermat O'Deena], eloped with Grainne, the daughter of king Cormac mac Art, and Finn mac Cumhail's betrothed spouse. The pair eluded Finn's pursuit for a year and a day, sleeping in a different place each night, under a leaba erected by Diarmaid after his day's journey; and according to the legend there was just 366 of them in Ireland. But this legend is a late invention, and evidently took its rise from the word leabaidh, which was understood in its literal sense of a bed. The fable has, however, given origin to the name of Labbadermody, Diarmait's bed, a townland in the parish of Clondrohid in Cork; and to the term Labbacallee - Leaba-caillighe, hag's bed - sometimes applied to these monuments.