Also in the Forum: The Birth of St. Patrick As I said, always try alternate spellings.
Google.com is a useful way of finding things. For example:
MICHAEL COLLINS (note spelling).
Till I Sleep appears to be available only through the International Lyric Server, which is now owned by the Harry Fox Agency: the site demands special access to your computer before allowing you to see the lyric, and I'm not prepared to allow that. Perhaps the CD has lyrics if you were to buy it. I believe that the lyrics for Sile (an awful lot of songs with that name in the title) are given on the sleevenotes that accompany Reeltime's record. They probably won't be a lot of use to you if you don't understand Gaelic, mind.