@paula-brawdy , there is plenty of sheet music for Boys of Wexford available online. Most of it seems to be in the key of G. It wouldn't be too hard to transpose that to D. But also note that Leo is playing a dulcimer with four equidistant strings. I'm sure you could figure out how to play the tune in regular DAd tuning, but it won't be exactly like his. Also, he uses the 1+ fret to get a C chord in Banish Misfortune.
Here is Leo's version for reference . He is a member here, so you might consider contacting him directly.
Dusty T., Northern California
As a musician, you have to keep one foot back in the past and one foot forward into the future.
-- Dizzy Gillespie
updated by @dusty: 04/07/18 10:18:38PM