Sharyn McCrumb writes of a Scottish song which is brought to appalachia. It is called "The Rowan Stave." I am trying to find out if this is a real song and what the tune might be. The song's lyrics are in her book "The Songcatcher."

The song's first stanza of the song is:

Upon the hill above the kirk at moon rise she did stand

To tend her sheep that Samhain eve, with rowan stave in hand.

And where she's been and what she's seen, no living soul may know,

And when she's come back home, she will be changed -- oh!

The last line is repeated for each stanza of the song.