an important item of evidence is the poem "cia lín don rígraid ráin ruaid", which survives in three manuscripts: rawlinson b 502, ria ms 23 d 17 (which attributes its copy to the book of glendalough) and national library of ireland ms g 3. in rawlinson b 502, the poem is embedded in a section on pious kings and accompanied by a short prose introduction as well as some marginal notes. in the versions of the poem given by ms g 3 and ms 23 d 17, the scribe explicitly cites the lebar glinne dá locha as his source, but the thematic context and the accompanying texts of the rawlinson b 502 version are found in neither of them. breatnach suggests that these shared differences are unlikely to have occurred independent of one another, but probably derive from a common source known to both scribes as the lebar glinne dá locha.