I listened carefully to Lui Collins singing "The Ballad of the White Seal Maid" on Spotify—it comes from the album "There's a Light" (2011)—and I have one important correction:

Verse 3 line 4 should be: "And only the seals hear the tune."

And an unimportant one: Verse 8 line 2 should be: "The fisherman's cry falls on water-deaf ears."