Contemporary arrangement of perhaps the greatest harp tune by Turlough O'Carolan (1670-1738). Arranger is guitarist El McMeen, who is included in the Digitaldreamdoor listing of the 100 Greatest Acoustic Guitarists. 

This tune (performed in CGDGAD tuning) is included on El's recording called "Celtic Guitar Treasures." https://store.cdbaby.com/cd/elmcmeen6