Hello K!

The song is called "The Douglas Tragedy", you can find it in the DT by clicking here

Like you said, it is an old song. Actually, it's a Child ballad, meaning that it's AT LEAST more than one hundred years old (Child wrote his books in the late 19th century).

I'm sure there are plenty of recordings of this song, or one of its many variations, but I can't give you any names now.

T.