There are a t least two tunes to this song which is called My Bony Mary in Johnson's Musical Museum. There is a quite martial tune which was always sung by Scottish tenors as the song was perceived to be an anti war song (see Sean O'Casey's play The Silver Tassie). I always saw it as a love song '... it's not the roar o' sea or shore, Wad make me langer wish to tarry; Nor shouts o' war that's heard afar, It's leaving thee, my bony Mary' so in the sixties I used the tune in the Museum and Nigel Denver recorded it on Major Minor. It is an exceedingly plaintive and haunting melody.