My best friend is from Cape Breton and she says that there is no such song as "The Cape Breton Lullaby". The song that she is familiar with done by Catherine MacKinnon is "The Atlantic Lullaby".

It goes: There's a place I'll always cherish beneath the blue Canadian sky where the shores down in Cape Breton meet the golden sun to rise

or something to that effect. Could this be the one that you are thinking of.

Please e-mail me if it is. Anne