"REAL OLD MOUNTAIN DEW" was written in the 1880's as an American stage song by Neg Harrigan & seeped into the oral tradition in Ireland. "GOOD OLD MOUNTAIN DEW" was written in the 20th century by Bascomb Lamar Lunceford in the South.
"GOOD OLD MOUNTAIN DEW" was written in the 20th century by Bascomb Lamar Lunceford in the South.