160 ProeeecUngs of tlie Royal Irkh Academy. 



wHcli occurs in cliflerent parts of Ireland.^ But in the neighbourhood 

 ■where we seek Tirechan's Duma Graid, near Mag Glais, there is none 

 to be found. ^ Thence Patrick and his companions went to Mag Glais. 

 The name of the plain of Glashas survived unchanged since Tirechan's 

 day, though with a far narrower signification. Moyglass is now a 

 small townland adjoining L. Tap in the parish of Kilmore,^ The 

 ancient Moyglass included the modern parish of Kilmore, of which it 

 is now only a small portion. This follows from the fact that the 

 Patrician church which gave its name to the parish of Kilmore was in 

 Moyglass, combined with the geographical consideration which suggests 

 the probability that there was a name to designate the' whole district 

 between the Baune hills and the Shannon. It is possible that the 

 territory thus named extended considerably beyond the parish of 

 Kilmore, south-westward, into the barony of Roscommon. This may 

 be inferred from the existence (a mile or so west from the south 

 extremity of L. Kilglass) of another townland, Moyglass, which looks 

 as if it too preserved the denomination of the original Mag Glais ; and 

 likewise from the name of the ' Church of Glas,' from which L.Bandea 

 eame to be called L. Kilglass. 



In tliis district,Patrick founded a large cellula called Cellula Magna, 

 that is, in Irish, Cell M6r. This foundation has been preserved, and 

 the original cell was, we may assume, not very far from the modern 

 church, about two miles north of the bridge which spans the mouth of 

 L. Kilglass. 



The circumstance that Cellula Magna in campo Glais is situated 

 ■close to that part of the Shannon which, in other respects, conforms to 

 the conditions which are implied in Tirechan's narrative, strongly 

 corroborates my conclusion that this writer makes Patrick cross the 

 Sliannon at L. Bofin. We must now return to the original difficulty. 

 While, as has been shown, the details of Tirechan's story make it clear 

 that the crossing was at L. Bofin, Tirechan designates the place of 



^ There is a L. Doogary in Leitrim ; another in Armagh ; there are Doogarys 

 in Cavan, Fermanagh, Tyrone, Monaghan, Down, Kerry. The nearest places to 

 Mag Glais are Doogarymore in the harony of Ballintober South, near L. Eee 

 (Ordnance Map of Koscommon, Sheet 40), and Doogary in barony of Boyle {ib., 

 sheet 4) ; but neither is possible. 



2 Yet it seems possible that the name survives in a corrupted form in the islet 

 which is known as Dockery's island at the mouth of L. Kilglass. If so, we 

 might infer that Duma Graid was opposite this island in the townland of Eushport. 



^ Rightly identitied by Mr. Hennessy in a note to his translation of the Vita 

 Tripartita in M. F. Cusack's Trias Thaumaturga (p. 427, n. 8). 



