An difríocht idir athruithe ar: "Leabhar na hUidhre"

Meastar go raibh triúr scríobhnóirí i mbun oibre ar an leabhar. D'aithin [[Richard Irvine Best]] thar a chéile iad de réir a lámhscríobhnóireachta, agus thug sé na litreacha '''A''', '''M''' agus '''H''' dóibh.<ref>R. I. Best, "Notes on the Script of ''Lebor na hUidre''", ''[[Ériu (journal)|Ériu]]'' 6, 1912, ll. 161–174</ref> Creidtear gur chomhaoiseach iad '''A''' and '''M'''. Thosaigh scríobhaí '''A''' an obair, agusag scríobh na leathnaighchéad openingleathnach de téacsanna ar leith, agus lean '''M''' ar aghaidh léi. D'aithin Best scríobhaí '''M''' le [[Máel Muire mac Céilechair]] meic Cuinn na mBocht, ''based on matching the handwriting with two marginal ''[[probatio pennae|probationes pennae]]'', in which the scribe wrote his name. A much later note elsewhere in the manuscript names Máel Muire as the person who "wrote and compiled this book from divers[e] books". His murder by Vikings at [[Clonmacnoise]] is recorded in the ''[[Annals of the Four Masters]]'' in 1106,<ref>''[[Annals of the Four Masters]]'' [ M1106.7]</ref> giving us a latest possible date and location for the main body of the manuscript. Some time later, ''H'' (named for his addition of two homilies) added a number of new texts and passages, sometimes over [[palimpsest|erased portions]] of the original, sometimes on new leaves. Based on [[orthography]] and an English [[loanword]], [[Gearóid Mac Eoin]] concludes that H wrote in the late 12th or early 13th century.<ref>Gearóid Mac Eoin, "The Interpolator H in ''Lebor na hUidre''", ''Ulidia'', December Publications, 1994, pp. 39–46.</ref>
''After the monastery of Clonmacnoise was broken up, the manuscript came into the possession of the [[O'Donnell dynasty]] of [[County Donegal|Donegal]] who held it until 1359, when it and the lost ''Leabhar Gearr'' were used to ransom members of the clan who had been taken prisoner by Cathal Óg [[Ó Conchobhair Sligigh]] (d. 3 November 1362). Áed Ruad O'Donnell recovered the manuscript in 1470, and it remained in Donegal at least until 1631, when the compilation of the ''Annals of the Four Masters'' was completed. Its location is unknown until 1837, when it was part of a collection owned by Messrs. Hodges & Smith of [[College Green]], Dublin, and was cited by [[George Petrie (artist)|George Petrie]] in an essay on the History and Antiquities of Tara Hill. The Hodges & Smith collection, 227 manuscripts in all, was purchased by the Royal Irish Academy in 1844.<ref>R. I Best and Osborn Bergin (eds.), ''Lebor na hUidre'', Royal Irish Academy, 1929, p. ix; ''[ Lebor na hUidre]'', Royal Irish Academy Library and Catalogue</ref>