lots of links This is probably the most comprehensive thread. But there are at least half a dozen others, with various titles and spellings. If you haven't had enough with this thread, the above link should get you to another thread where you'll find lilnks to the other threads and DT versions of the lyrics.

By the way, if you write súil instead of siúl, you are writing the Irish word for 'eye' not for 'walk' and it would be pronounced more like "sool" than like "shool". The S only takes an sh pronounciation before the letters i and e.