Phillip's Little Boat is an old Irish childhood song. The melody is simple yet timeless and beautiful. 

Here's a link to my husband Jim and I playing it in the "Tune of the Month" archives on my website, happyhollowmusic.com

https://www.happyhollowmusic.com/musicpdffiles/Phillips%20Little%20Boat.mp3

And here it is sung in the original Gaelic:

https://www.youtube.com/watch?v=5FEU5GMPPNI