Mr Morgan believed the best option for Ngapuhi was not a single settlement but five separate settlements based on hapu groupings. Ngati Kahungunu, the country's third largest iwi, had successfully settled that way.
Leadership within both iwi and Government was the single most important factor in resolving the impasse, he said.
Also called as a witness was former Prime Minister Jim Bolger, who led a 2011 mediation attempt. He agreed that strong leadership, and the courage to make compromises, was needed.
Mr Bolger said settlement would be reached only through a change in the hearts of the main players, not through lawyers and "arguing endless, minute points".
Ngapuhi owed it to the younger generation to reap the benefits of settlement, as Tainui and Ngai Tahu had done, without further delay.
"We cannot ignore the needs of the young people of the North. How can we adults here not be moved by that, and not want to do something? I hear people say, it [the full Waitangi Tribunal process] is just another few years - but that's another generation of young Ngapuhi who end up in Australia."
Today's witnesses include Maureen Hickey of OTS, former MPs Shane Jones and Tau Henare, and runanga chairman Sonny Tau.