Olden — The Oratory of Gallerus. 569 



modem -writers in treating da always as the numeral. In the Supple- 

 ment to O'Eeilly's Dictionary he says: "t)d, two, frequently enters 

 into topographical names " ; and then he gives instances, one o£ which 

 is Dun da leth glas and Gleann da loch, the very form of which ought 

 to have shown him his error. But when we find da prefixed to 

 personal names, the meaning is placed beyond mistake. Thus 

 Killaloe is in the Annals Cill da Lua, not surely the Church of two 

 Luas but " the Church of Lua," the well-known saint. Again 

 Kilmallock is Cill da Cellach, "the Church of St. Cellach, and so on 

 in numerous instances. 



NOTE ADDED lis" THE PRESS. 



Dun-leth-glaise, according to Bishop Beeves, means ' the Fort of 

 Leth-glas.' " In latter times," he says, " the syllable da was 

 inserted." There seems to have been no change of meaning intended, 

 and dd meant simply a more emphatic form of the genitive. It was 

 afterwards taken for the numeral two, and then it became necessary to 

 make a change in the second part of the name, and so Lethgiaise, 

 genitive singular, was changed to leth glas, genitive plural, to corre- 

 spond with dd. Joceljn, as mentioned, translates this the ' Eort of 

 the two broken locks or fetters,' which is a complete change from the 

 original meaning, for glas, a lock or fetter, which is either masculine 

 or neuter, has no connexion with the glas^ gen. glaise, of the original 

 name. 



