In the mid-1980s, John Campbell of Mullaghbawn, Co. Armagh and Len Graham of Co. Antrim, began singing together around the country. In addition to solo items - songs from Len and stories from John - they sang duets, including some lilting, and played the Jew's harp together.
John and Len performed around the world together from Europe to the United States.
They also took traditional songs and stories into schools of different denominations in Northern Ireland and performed in hospitals and prisons, recording two acclaimed albums, Ebb and Flow and Two for the Road.