But not only do these measures of land vary in size and denomination, but the _Tuath_ or tribe territory appears also to have varied in different parts of Ireland as well as the constitution of the tribe possessing it. The publications of the Irish Archæological and Celtic Societies afford specimens of this in four of the provinces in Ireland. Thus the preface to the poems of John O Dugan, who died in 1372, opens with reference to Meath with the general statement—‘His country (_Duthaidh_) to every _Ardrigh_ and to every _Urrigh_ and to every _Taoisech_ of a _Tuath_ in Erin.’[180] In the district of Corca Laidhe in Munster, which represented a _Mortuath_, instead of containing merely three or seven _Tuaths_, we find eight _Tuaths_ mentioned, and of seven of these the head of the tribe is termed its _Toisech_, and bears the same name, while the _Flaith_ or chiefs are called _Oclaich Duthaich_, or the champions of the territory. The first is the _Duthaich_ or country of _O Gillamichil_, with seventeen _Oclaich_. Then we have the _Tuath Ui Chonneid_, with O Conneid as its _Toisech_, and five _Oclaich_. Then _Tuath Ruis_, with O Laeghaire as its _Toisech_, and eleven _Oclaich_ or chiefs. Then Tuath O’n-Aenghusa, with O h-Aenghusa as its _Toisech_, and fourteen _Oclaich_. Then Tuath O’Fithcheallaigh, with O’Fithcheallaigh as its _Toisech_, and eight _Oclaich_. Then Tuath O’n Dunghalaigh, with O Dunghaill as its _Toisech_, and nine _Oclaich_. Then Tuath Ui-Dubhdaleithe, with O Dubhdaleithe as its _Toisech_ and seven _Oclaich_. The boundaries of these several _Tuaths_ are likewise given.[181]