he says he was at a funeral for a fiddler he knew i think.  another man came and talked with them and sang the aire.  Junior said he did not know how to speak gaelic, which the aire was sung in, but was good at remembering melodies and made the hornpipe from it and named it for that place Caislean an Oir.  Im thinking maybe the aire was named translated the priests lament.  the story he told i think is maybe tied to the aire somehow but guessing.  maybe after you listen more you can catch it.

hopefully i got that correct.  I know the hornpipe is this but i dont know if the translation is the golden castle.  Just that evidently Junior Crehan wrote it after being inspired by an aire ..or is it lament.. idk..those slow mornful songs.  

@elcbk

im guessing, but the way he played in his solo album IS a solo interpretation.  Later on when he recorded the shores of lough graney with his Dad and Dennis Cahi it is more of a session or group version.  IM SPECULATING for coversation.  Totally a guess.  But Id say it is more commonly played like a hornpipe in a session unless someone wants to play as an aire solo.

whats your favorite version? 

another speculation on the story told could be..its a story.  for the sake of telling a story.  kinda like the one about the fiddler accused of a crime..on the gallows. will give fiddle to anyone that can play such and such..  heard it associated with hangmans reel..colemans march and some others.  a guess idk.  BUT theres a tune called the golden castle that seems to be associated with Junior Crehan..and its sounds cool as an aire OR hornpipe.