SSA. Found this on Suzannah & Georgia Rose’s Across The Blue Mountains CD and can’t find any more info than that anywhere. Help. Their version is a duet; my arrangement added alternating solos, duets, and trios at the opening and an alto line throughout. Shape note style song. The lyrics draw on ancient Irish themes of blessing and praise, asking the Moon to bring health and end all suffering. I changed the lyrics of the final verse away from the Christian message to more universal themes.