Don't know where you can find the midi or whatnot but its a great song. By Lady (Baroness) Nairn I believe who for an aristocrat had an absolutely brilliant and totally Scottish way with words which quite cut through class differences--another song of her composition which illustrates this is Caller Herrin. Ettrick must be in some old songbook somewhere but I've never seen it in print.

The Archie Fisher recording is Off the Map, his (first) album with Garnet Rogers.

Let me know if you don't get no satisfaction, might be able to help. The melody is rather subtle and probably unique to this song.

Willie-O