I've just heard someone sing different lyrics, to the Jerry Holland tune.  Can't locate these lyrics' author.  James Galway recorded this version.

Home where the river flows
Home where the clover grows
Home where my dreams keep me longer to be
I've been away too long so here's a song
For my Cape Breton Home by the sea. Home where the fiddles ring
Making the mountains sing
Home where the music is calling to me

Someday before I die
I Will return to my
Cape Breton Home by the sea. I'll rosin the bow and go waltzing away
To the mountains and glens
By The Sweet Margaree
I'll play an air for the island so fair
And my Cape Breton Home by the sea.