But that moment when Yunupingu presented him the Barunga Statement haunted Hawke.

Precisely one minute before his years as prime minister ended on December 20,1991,Hawke stood before the bark painting at Parliament House in Canberra,and declared:“The important thing is what’s in our minds and in our hearts.”

The previous day,Paul Keating had won his second challenge to Hawke’s prime ministership. As Hawke spoke,Keating was at Government House,about to be sworn in as Australia’s 24th prime minister.

The vanquished Hawke had insisted that his final act as PM must be to keep an old promise to Yunupingu and his people and unveil the Barunga Statement in Parliament House. It was – and remains – mounted at the entrance to parliament’s Great Hall.

“Its presence here calls on those who follow me;it demands of them that they continue efforts,that they find solutions to the abundant problems that still face the Aboriginal people of this country,” said Hawke,speaking without notes.

Beside him stood Yunupingu,who had come from Arnhem Land to farewell PM Hawke and remind all the prime ministers to come to stay true to the significance of the bark painting’s message.

And he had words of his own.

“Great leaders have to step down for other leaders,” said Yunupingu.

“The Aboriginal people have expected things like this[Hawke’s defeat] and I made a very clear statement to Bob when this Barunga Statement was handed over to him that when his time finishes he will have to pass it on,and pass it on,and pass it on.”

Now,Yunupingu,who spent much of his life in pursuit of justice and rights for his people,has passed on,too. The senior Yolngu lore man,Gumatj clan leader and the keeper of songlines died on Monday,aged 74,after a long illness.

But as Australia wrestles with its latest attempt to grant recognition to Indigenous Australians – a referendum asking no more than to give Aboriginal and Torres Strait Islander people the constitutional right of aVoice to Parliament – it remains a fact that there have been eight Australian prime ministers since Hawke.

And not one of them has come near to meeting the request for a treaty inscribed in the Barunga Statement and handed over around a campfire by the now late Aboriginal leader,Yunupingu,to the leader of the nation of Australia in its so-called Bicentennial year,1988.

“Pass it on,pass it on,pass it on.”

Cut through the noise of federal politics with news,views and expert analysis from Jacqueline Maley.Subscribers can sign up to our weekly Inside Politics newsletter here.