Líon alt a bhfuil an ghné seo luaite iontu: 1
Phelan, 1997 in eagar ag John Kirwan (‘Canon Carrigan: achievement and challenge’) agus in An index to the Rev. William Carrigan’s The history and antiquities of the Diocese of Ossory, 2005 a réitigh Helen Litton ··· Deir Ó Fearghail ( An inndex ...): ‘He did, however, retain a lifelong interest in the language and used it very effectively in his work on placenames, as may be seen throughout his History and antiquities