the case for identification was made by scholars like eugene o'curry (1861) and james carney (1964), but it has been argued most forcefully and elaborately by pádraig ó riain. he observed close textual affinities between copies of texts which acknowledge their source as being the book of glendalough, such as the first two items above, and versions of these texts in rawlinson b 502. caoimhín breatnach, however, criticises his methodology in establishing textual relationships and concludes that lebar glinne dá locha and rawlinson b 502 are two separate manuscripts.