Wikipedia says Dermot O'Reilly (1942-2007) was an Irish-born Canadian musician, producer, and songwriter. He was a member of a group called Ryan's Fancy, and also performed with Fergus O'Byrne.

I would think your best bet for licensing the song, would be to go through the Ryan's Fancy Website, http://www.ryansfancy.com/Contact.htm

By the way, there are lyrics to lots of Dermot O'Reilly songs at GEST. The GEST people really know their stuff, and I'll bet they can help you license the song if the leads I gave don't work.

Harry Fox Agency Songfile has one Dermot O'Reilly song listed, Mist Upon a Morning. the publisher is Morning Music (USA), Inc. - morning@look.ca It wouldn't hurt to contact them for information about your song.
Here's the full listing for Morning Music: http://www.mpa.org/music-publisher/3317


Cape St. Mary's is listed at the Harry Fox Agency, and can be licensed online through http://www.songfile.com/.


-Joe-