Lotusland asks which Glencoe song. If you look at the Digital Tradition Database Search box at the top of this page, you'll find a few Glencoe songs. The one in question has the chorus "Cruel was the snow that sweeps Glencoe" (though I sing "White was the snow that covered Glencoe"). the database doesn't credit the author, maybe Dick and co. will rectify this omission in the next update? See also this Glencoe thread