Apparently I was mistaken about Margaret’s Waltz being an Irish tune. An yet, I’m going way out on a limb here and saying this is an Irish reel. Definitely sounds Irish.
I worked out a harmony part in twin fiddling for this, but you need to go into second position to pull it off. That’s one reason for not producing a tab chart. Maybe someday, in music notation.
Some of the bowing may seem a little odd. I arranged it so that the cross string bowing could be up bow on the E and down bow on the A. The bow technique feels more natural.
Here’s the pdf for Julia Delaney.